I've been so busy that I haven't slept ... two days!
since
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I'm really hungry! I haven't eaten ... this morning.
since
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Sam and Martha have owned their new car ... April.
since
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I haven't had a holiday ... last summer.
since
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Our universe has existed ... billions of years.
for
since
We're ready to leave. In fact, we've been ready ... an hour.
since
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Michael has had the same job ... ten years.
since
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Isabella hasn't ridden her bicycle ... she fell off it last week.
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since
Mr. Smith has been away from his desk ... a few minutes.
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since
Patrick is really tired. He has been awake ... four o'clock this morning.
since
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Dinosaurs have been extinct ... millions of years.
since
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My neighbors have been away on holiday ... several weeks.
since
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I haven't watched TV ... the day before yesterday.
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since
Iceland has been inhabited ... only about a thousand years.
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since
The store has been closed ... last Wednesday.
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since
Jenny and I have been friends ... we were kids.
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since
New Zealand has been an independent country ... 1947.
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Margaret has lived in Spain ... a long time.
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since