1. We use time clause to provide information about actions and events in the past, present and future.

Do you remember when you had your first interview? (past time)

When your customers are unhappy, they’ll usually tell at least 20 other people. (true all the time)

When I find the missing documents, I’ll bring them to you. (future time)

2. We use a present tense, not will, to refer to future time in a time clause.

Until inflation is under control, planning will be difficult. (*NOT will be under control)

Once we finish the project, we’ll have more time. (*NOT will finish the project)

Can you look at this before you leave? (NOT *will leave)

I’ll see you when the meeting finishes.

3. Note that:

·         a present perfect in a time clause refers to a future situation.

I’ll get back to you as soon as we have decided what to do.

She’ll write you after/when she’s spoken to her boss.

We won’t know the results until we’ve received all the sales reports.

·         while means ‘during the time’ or ‘at the same time as’.

I like to listen the music while I’m working.

While I was in Italy, I went to see Alessandro.

for/since/during

1. We use both for and during with periods of time, but the is usually used after during.

I haven’t seen her for a month. (NOT *during a month)

He fell asleep during the meeting.

1. We use since with points in time.

The company has expanded fast since it was founded.



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20.01.2021
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