Rewrite the following sentences twice, using SINCE and FOR

1a) We've been here since 4 o'clock.

1b) We've been here for an hour.

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2a) She hasn't spoken to me since last week.

2b) She hasn't spoken to me for 2 weeks.

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3a) They've lived in this street since 1970.

3b) They've lived in this street for a long time.

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4a) I haven't had time to do It since last Monday.

4b) I haven't had time to do It a few days.

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5a) We haven't bought a new one since ages.

5b) We haven't bought a new one for many years.

надеюсь <3