`1,` He hasn't gone aboard before

`2,` She has driven for `1` month

`3,` We have eaten since it started to rain

`4,` I haven't had my hair cut since I left her

`5,` She hasn't kissed me for `5` months

`6,` We haven't met for a long time

`7,` How long have you had it ?

`8,` I haven't had such a delicious meal before

`9,` The last time I saw him was `8` days ago

`10,` It is Monday since I last took a bath

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                Chuyển QKĐ `->` QKHT

`@` This is the first time + S + have/has + P2 ...

`->` S + have/has + not + P2 + ... + before

`->` S + have/has + never + P2 + ... + before

`@` The last time + S + V2/ed + ... + was + t/gian + ago

`->` S + have/has + not + P2 + ... + for + t/gian

`->` S + last + V2/ed + ... + t/gian + ago

`->` It's + t/gian + since + S + V2/ed ...

`@` S + began/started + to V/V-ing ...

`->` S + have/has + P2 + ... + for + t/gian

`@` When + did + S + started/began + to V/V-ing ... ?

`->` How long + have/has + S + P2 ... ?