Present perfect with for/ since

......five minutes.

• since

• for

......January.

• since

• for

......1990.

• since

• for

......the summer.

• since

• for

......three hours.

• since

• for

.....10 weeks.

• since

• for

.....Friday.

• since

• for

.....20 years.

• since

• for

.....20 minutes.

• since

• for

.....December.

• since

• for