Future Time Clauses: When, Until and As Soon As
By the end: I can connect future actions with a clear time relationship.
Try the activities, then check your answers.
Try the activities, then check your answers.
Choose a short recording.
Before you start
What will you do when your next lesson finishes?
Useful background: Will, present simple and basic future arrangements.
Present form, future reference
In a time clause about a future event, normally use a present form rather than will. The main clause can contain will, another suitable future expression or an instruction.
I’ll call you when I arrive.
Check the address before you leave.
When can introduce a time clause or an indirect question
Arrive has a present form although the arrival is in the future.
This asks what time the train will arrive, so will is possible.
Continue until an endpoint
Until tells us when an action or state stops. It does not mean immediately after. Make the continuing activity clear, especially with a negative statement.
I’ll wait until you finish.
We won’t start until everyone arrives.
Act as soon as something happens
As soon as links an action to the earliest relevant moment after another event. When gives a broader time connection; before and after establish order. Put a comma after an initial time clause.
As soon as I get the result, I’ll tell you.
We’ll eat after the guests arrive.
Guided practice
Say or write your answer first. Compare the meaning and form; the model is one possible answer.
1. Complete: I’ll call when I ___. Use arrive.
Compare a model and explanation
arrive
Use a present form in this future time clause.
2. Correct: We’ll leave as soon as the rain will stop.
Compare a model and explanation
We’ll leave as soon as the rain stops.
The time clause takes present simple stops.
3. Join with until: I will wait. Your class will finish.
Compare a model and explanation
I’ll wait until your class finishes.
Waiting continues to the class’s endpoint.
4. Join with after: The guests will arrive. Then we will eat.
Compare a model and explanation
We’ll eat after the guests arrive.
After sets the sequence without needing will in its clause.
5. Use a negative main clause: We will start only when Ben arrives.
Compare a model and explanation
We won’t start until Ben arrives.
Not until delays the start to the specified event.
6. Add punctuation: When I finish work I’ll call.
Compare a model and explanation
When I finish work, I’ll call.
A fronted time clause is normally followed by a comma.
7. Explain the difference: I’ll wait until you arrive. / I’ll leave as soon as you arrive.
Compare a model and explanation
The first action continues up to arrival; the second begins immediately after arrival.
Until marks an endpoint; as soon as marks an immediate trigger.
8. Is Do you know when the train will arrive? necessarily wrong? Explain briefly.
Compare a model and explanation
No. Here when introduces an indirect question about arrival time, not a future time clause modifying another action.
The rule applies to a grammatical function, not every occurrence of when.
A short conversation
Listen first if you can, then open the transcript when useful.
Open the conversation transcript
A: When will you send the updated plan?
B: I’ll send it as soon as I check the figures.
A: Can we start before the whole group arrives?
B: Let’s wait until everyone is here. Then we can explain it once.
Listening checks
Listen to each extract or open its transcript. These three questions have their own score.
Mastery quiz
Choose the best answer in each situation. Your score is out of eight.
Use it in your own words
Speaking task 1
Plan a small event with three linked steps. Use before, when and as soon as.
Reveal a possible response
Before the guests arrive, we’ll check the room. When everyone is here, we’ll introduce the activity. As soon as the first group finishes, we’ll take a break.
Success check: Keep present forms in the future time clauses and make the sequence practical.
Speaking task 2
Negotiate a meeting after a delayed class. Include one until sentence and one alternative plan.
Reveal a possible response
I’ll wait until your class finishes. As soon as you leave the building, call me. If it is very late, we can meet another day.
Success check: Distinguish waiting up to an endpoint from acting after it.
Speaking task 3
Explain your next study session using both an instruction and a promise.
Reveal a possible response
Check the examples before you begin. I’ll compare my answers after I finish the exercise, and I’ll repeat the speaking task when I have a quiet moment.
Success check: Vary the main clause while preserving the future time relationship.
Take it with you
I can connect future actions with a clear time relationship.