the present perfect tense
1.I(be)......................a wake since 4 o'clock.
2.Mr.Pike (live)............................here since last october.
3.We (not see).........................them for a long time.
4.my father (not smoke)...........................for a long time.
5.george (work).............................at the university so far.
6.how long .......................you(practise)..........................piano?-I(practise)......................it since 10a.m
7.I(work)...................at my report since Monday
8.i(collect).......................stamps since i was a child
9. ....................you ever (be)..........................to HCM city?-Yes,i(go)..........................there last month
10.since they(go).........................away,they(not contact)........................to theirb family
11.we (not do).............................anything since we (arrive)......................here
12. ........................you ever(visit).........................Hue city?-yes,i(visit)........................it 3 years ago
13.i(not wear).................that suit since my sister (marry)......................
14.Minh just(win).............................the first prize in the talent contest
giúp mk nhé