Could Have Been Being: Editing Stacked Verb Phrases
In this lesson, you can identify the relevant meanings in a stacked auxiliary phrase.
Try the activities, then check your answers.
Try the activities, then check your answers.
Choose a short recording.
Before you start
Describe a possible ongoing past activity simply.
See one possible response
It is possible that the file was being checked.
A fictional archive note says: At noon, the catalogue could have been being updated. The writer knows neither whether updating occurred nor who might have done it. Other mini-cases supply their own evidence.
What you will practise
- Identify the relevant meanings in a stacked auxiliary phrase.
- Produce a clearer paraphrase while retaining time, viewpoint and attribution.
- Explain the information lost or added by a proposed edit.
Respond before revealing. Preserve scope, attribution and evidence limits. A defensible alternative or genuine ambiguity must not be marked wrong merely for differing from the model.
Unpack the chain
Could have been being updated combines possible earlier activity, progressive viewpoint and passive voice in the intended context. The wording is heavy, so first identify what each layer contributes. A possible process is not a confirmed event or completed result.
At noon, the catalogue could have been being updated.
It is possible that the catalogue was being updated at noon.

Simplify without inventing an actor
A separate possibility clause can make the message clearer. Keep the earlier time and ongoing viewpoint. An active rewrite can be useful, but a named actor must come from evidence, not from a desire for a shorter sentence.
Someone may have been updating the catalogue at noon, but we don’t know who.
The note suggests possible updating at noon; it does not identify an editor.
Check what changed
Could have been updated no longer explicitly presents the process as ongoing. Was being updated removes uncertainty. Was updated by Jo adds an actor and asserts an event. These may be useful sentences in other contexts, but they are not equivalent to the original note without more evidence.
We don’t know whether updating was in progress at noon.
The record does not establish that the catalogue was finished.
Track the lost meaning in each edit
The original did not confirm the process.
The sentence still presents possibility.
Neither addition is licensed by the original note.

Guided practice
Say or write your answer first. Then compare the meaning and grammar with the model.
1. List four contributions in could have been being revised in an explicitly past, ongoing, passive context.
Compare a model and explanation
Possibility, earlier time, ongoing viewpoint and passive voice.
The target context selects these readings; could has other uses elsewhere.
Accept a grammatical alternative that satisfies the stated prompt and this item’s explanation; the model is not an exhaustive exact-string key.
2. Rewrite The display may have been being repaired at six more clearly.
Compare a model and explanation
It is possible that the display was being repaired at six.
The rewrite preserves uncertainty and the ongoing past process.
Accept a grammatical alternative that satisfies the stated prompt and this item’s explanation; the model is not an exhaustive exact-string key.
3. Source: The file could have been being checked. Report: The file was being checked. Restore the missing meaning.
Compare a model and explanation
The file may have been being checked; more clearly, it is possible that it was being checked.
The report must not turn possibility into fact.
Accept a grammatical alternative that satisfies the stated prompt and this item’s explanation; the model is not an exhaustive exact-string key.
4. The source gives no actor. Is Jo may have been checking the file an equivalent rewrite?
Compare a model and explanation
No. It introduces Jo as a possible actor without support from the source.
An unspecified someone avoids naming an unsupported person.
Accept a grammatical alternative that satisfies the stated prompt and this item’s explanation; the model is not an exhaustive exact-string key.
5. Does The file may have been checked explicitly preserve the original ongoing viewpoint?
Compare a model and explanation
No. It does not explicitly locate the checking as in progress.
This difference does not make completion certain in every context.
Accept a grammatical alternative that satisfies the stated prompt and this item’s explanation; the model is not an exhaustive exact-string key.
6. Produce a short summary of the catalogue note that keeps its uncertainty but acknowledges omitted detail.
Compare a model and explanation
The note raises the possibility of updating around noon; it does not confirm it.
This is a summary, not a fully equivalent paraphrase of every aspectual detail.
Accept a grammatical alternative that satisfies the stated prompt and this item’s explanation; the model is not an exhaustive exact-string key.
7. New evidence shows an editor was working at noon but does not show completion. Write the stronger statement now licensed.
Compare a model and explanation
An editor was updating the catalogue at noon, but completion is not established.
The new evidence permits an event assertion but not a completed-result claim.
Accept a grammatical alternative that satisfies the stated prompt and this item’s explanation; the model is not an exhaustive exact-string key.
8. Explain why a fluent shorter sentence can still be a poor edit.
Compare a model and explanation
It may change certainty, timing, viewpoint or agency.
Readability and fidelity must both be checked.
Accept a grammatical alternative that satisfies the stated prompt and this item’s explanation; the model is not an exhaustive exact-string key.
A short conversation
Listen to the exchange, then take one role. The speaker labels identify roles; do not narrate them.
Open the conversation transcript
Archivist: This note says the catalogue could have been being updated at noon.
Colleague: Could we write that Jo updated it?
Archivist: No. We don’t know the actor or even whether the updating happened.
Colleague: Then I’ll write that updating may have been in progress at noon.
Listening checks
Listen to each extract, then choose the best answer. These three questions have their own score.
Answer key with explanations
Which claim is supported?
Revision in progress at ten is presented as possible.: The stimulus explicitly combines possibility with the ongoing viewpoint.
Compare all choices
- A named editor finished the revision.: Neither a name nor completion is supplied.
- The revision definitely did not happen.: Lack of confirmation is not a denial.
- Revision in progress at ten is presented as possible.: The stimulus explicitly combines possibility with the ongoing viewpoint.
What changed?
A possible activity became an asserted activity.: Removing may changes the commitment.
Compare all choices
- A possible activity became an asserted activity.: Removing may changes the commitment.
- Present time became future time.: The contrast concerns a past activity.
- A known actor was removed.: No actor is named in either sentence.
What does the new evidence establish?
Work was in progress, but completion remains unconfirmed.: The recording supports activity at noon but ends before its outcome.
Compare all choices
- The file was finished at noon.: The outcome is expressly unavailable.
- Work was in progress, but completion remains unconfirmed.: The recording supports activity at noon but ends before its outcome.
- No work occurred.: The recording shows work.
Mastery quiz
Choose the best answer for each situation. The score is out of eight.
Answer key with explanations
Which is the closest plain paraphrase of the catalogue note?
It is possible that the catalogue was being updated at noon.: The central meanings remain explicit.
Compare all choices
- Jo finished updating the catalogue at noon.: This invents an actor and completion and removes uncertainty.
- It is possible that the catalogue was being updated at noon.: The central meanings remain explicit.
- The catalogue will definitely be updated at noon.: This changes time and certainty.
Which edit removes possibility while retaining past progression?
The catalogue was being updated at noon.: The process is now asserted.
Compare all choices
- It is possible that someone was updating the catalogue at noon.: Possibility remains explicit.
- The catalogue may have been being updated at noon.: Possibility remains.
- The catalogue was being updated at noon.: The process is now asserted.
What does replacing been being updated with been updated remove explicitly?
The progressive presentation of updating as ongoing.: The shorter phrase lacks the progressive layer.
Compare all choices
- The progressive presentation of updating as ongoing.: The shorter phrase lacks the progressive layer.
- All reference to earlier time.: Have been updated still has perfect marking.
- Every possible passive interpretation.: Been updated remains passive in the intended construction.
The original does not identify an actor. Which active rewrite avoids inventing a name?
Someone may have been updating it at noon.: Someone leaves identity unspecified.
Compare all choices
- The known editor finished it at noon.: Known editor and completion both add unsupported information.
- Someone may have been updating it at noon.: Someone leaves identity unspecified.
- Jo may have been updating it at noon.: Jo is introduced without evidence.
Which conclusion is not licensed by the original?
The catalogue was completed.: Completion is not established by a possible ongoing activity.
Compare all choices
- Updating is presented as possible.: That is part of the intended reading.
- The actor is not identified in the note.: No actor is named.
- The catalogue was completed.: Completion is not established by a possible ongoing activity.
Which editing strategy is strongest?
Identify each meaning before choosing a clearer structure.: This reduces the risk of losing a relevant distinction.
Compare all choices
- Identify each meaning before choosing a clearer structure.: This reduces the risk of losing a relevant distinction.
- Delete the longest part without checking meaning.: That can erase essential information.
- Keep every auxiliary regardless of the reader’s needs.: Equivalent clearer structures may be preferable.
New evidence proves activity at noon but not completion. Which report fits?
An editor was updating the catalogue at noon; completion is unconfirmed.: This matches the evidence and its limit.
Compare all choices
- No updating happened at noon.: That contradicts the new evidence.
- An editor was updating the catalogue at noon; completion is unconfirmed.: This matches the evidence and its limit.
- The catalogue had definitely been completed by noon.: Completion is not shown.
Which distinction matters when assessing a shorter version?
Whether it is a full paraphrase or a deliberately less detailed summary.: A summary may omit detail, but should not be called fully equivalent.
Compare all choices
- Whether it uses a named subject rather than an indefinite one.: Naming an actor without evidence can reduce accuracy.
- Whether it contains exactly the same number of verbs.: Equivalent meaning does not require identical structure.
- Whether it is a full paraphrase or a deliberately less detailed summary.: A summary may omit detail, but should not be called fully equivalent.
Use it in your own words
Unpack, then paraphrase
Create a possible past ongoing passive activity in a fictional archive or studio. Explain its layers and restate it clearly.
Reveal a possible response
The recording could have been being edited at eight. That means editing may have been in progress then; it doesn’t confirm that it happened or identify an editor.
- Preserve possibility
- Preserve past progression
- Avoid unsupported agency
Choose a natural clearer version rather than aiming for maximum complexity.
Defend an edit
A colleague wants to replace a possible ongoing activity with a completed event. Explain what evidence is missing.
Reveal a possible response
Saying the labels were finished would go beyond the note. We only have a suggestion that someone may have been working on them at noon. We need evidence of the result before claiming completion.
- Compare commitments
- Identify the missing evidence
- Offer an accurate alternative
You may use a different harmless task with the same distinction.
Put it all together
A fictional music project has an uncertain note, then a short recording confirming work but not completion. Give the first report, update it using the new evidence, and explain the change.
Reveal a possible response
At first, we could only say the track might have been being mixed at nine. More clearly, mixing may have been in progress. The recording now shows an engineer mixing it at nine, but it ends before the result. We can assert the activity, not completion.
- Distinguish the two evidence stages
- Preserve time and viewpoint
- Strengthen only what new evidence supports
This is an editing task; no actual media-production result is claimed.
Take it with you
Before editing an auxiliary stack, identify possibility, time, progression and voice. A clearer sentence must not invent an actor or outcome. Distinguish a full paraphrase from a shorter summary.
