Giúp tớ câu 18 19 20 với

`18`,

- It’s 3 months since she last was to the hairdresser.

- The last time she was to the hairdresser was three months ago.

- She last was to the hairdresser three months ago.

`19`,

- It’s a long time since we last visited our parents.

- The last time we visited our parents was a long time ago.

- We last visited our parents a long time ago.

`20`,

- It’s 2 weeks since I last met him

- I last met him 2 weeks ago.

- The last time I met him was 2 weeks ago.

`---------`

- S + have/has + not + PII + for + khoảng thời gian : ai đó không làm gì được bao lâu rồi

-> The last time + S + Ved/ V2 + was + khoảng thời gian + ago : lần cuối ai đó làm gì là vào bao lâu trước đây

-> S + last + Ved/ V2 + khoảng thời gian + ago : ai đó lần cuối làm gì là vào bao lâu trước đây

-> It is + khoảng thời gian + since + S + Ved/ V2 : đã bao lâu kể từ lần cuối ai đó làm gì