GRAMMAR: PRESENT PERFECT + FOR AND SINCE

I've had these jeans for/since two weeks.

The weather has been bad for/since we arrived.

Kate has been a supporter of her local football team for/since she was 10 years old.

I haven't been to school for/since four days. I've been ill.

We've know each other for/since many years.

I've loved swimming since/for I was four.

Beach volleyball has been an Olympic sport since/for 1996.

Our team hasn't won a match since/for January.

Suzie has taken part in the London Marathon since/for 10 years.

My dad has been a teacher since/ for he finished university.