`text{1)We haven't seen our grandparents for 2 years.}`

`text{2)This is the first time I have read such a romantic story.}`

`text{3)My father hasn't seen my uncle for nearly twenty years.}`

`text{4)We haven't seen him  since Monday.}`

`text{5)John last his hair cut over six month ago.}`

`text{6)When did you study medicine?}`

13 We haven't seen our grandparents for 2 years

14 This is the first time I have read such a romantic story 

15 My father haven't seen my uncle for twenty years

16 We haven't gone to a cinema for two years

17 We haven't seen he since Monday

18 John last had his hair cut over six months ago.

    _ It is over six months since John last had his hair cut.

19 When did you study medicine