Using time clauses

Time clauses&Prepositions of Movement

Time clauses are introduced by conjunctions such as: after, as soon as, before, until, when, while.

We do not use future forms in a time clause; we use the present. 

1. What are you doing next Thursday?

2. Are you going to do your homework tomorrow?

3. Will he go to college after high school?

4. When are their friends arriving from Syria?

5. Where is she going to meet her sister?

Examples

They’ll probably go skiing when they are on vacation. (future)

They went skiing when they were on vacation. (past)

I’ll go shopping while you cook dinner. (future)

He went shopping while his wife cooked dinner. (past)

Note

We place a comma after the time clause when it begins the sentence.

As soon as we arrive, we’re going straight to the hotel. 

After I explain the lesson, I will give you a quiz.

Prepositions of Movement

across

through

 along

away from

to/towards a

out of

into

around