3 we have flown to Singapore for 5 years
-> S + have / has + vpii + for + 1 khoảng thời gian = it has + VPII + since + S + V thì QKĐ
4 i haven't cut my hair since november
-> S + last + V2 + in + mốc thời gian = S + haven't / hasn't + VPII + since + 1 mốc thời gian
5 we haven't called each other for 5 months
-> the last time + S + V-ed + was + 1 khoảng thời gian = S + haven't / hasn't + VPII + for + 1 khoảng thời gian
6 we haven't met each other for a long time
-> S + haven't / hasn't + VPII + + for + 1 khoảng thời gian = it is a long time + since + 1 mốc thời gian
7 how long long have you had it ?
-> how long + have / has + S + VPII
8 i haven't had such a delicious meal before
-> this is the fisrt time + S + have / has + VPII = S + haven't / hasn't + VPII + before
9 the last time I saw him was 8 days ago
-> the last time + S + V-ed + was + 1 khoảng thời gian = S + haven't / hasn't + VPII + for + 1 khoảng thời gian
10 he has been collecting stamp for five years
11 this is the first time she has talked to the foreign
-> this is the fisrt time + S + have / has + VPII = S + haven't / hasn't + VPII + before
12 she hasn;t written for me since 2016
-> S + last + V-2 + in + 1 mốc thời gian = S + hasn't / haven't + VPII + since + 1 mốc thời gian
