`1.` I haven't really enjoued myself since your birthday party
`2.` My father hasn't seen his brother for nearly 20 years
`3.` How long is it since you learnt to drive?
`4.` I haven't gone swimming since we were in Spain.
`5.` It is weeks since you tided up this room
`6.` We have been looking for a flat for 2 months
`7.` I haven't been to a night club before
`8.` This is the first time they have ever heard such a thing
`9.` This is the first time his authority has been challenged
`10.` It is 2 years since she left unviersity
`11.` I’ve never known a more warm-hearted person than my mother
`12.` It is over a year since I last saw them
`13.` It has rained since 2 o’clock
___________________________________
`-` Áp dụng:
`@` thì hiện tại hoàn thành:
`->` S + have/has + Vpp + O.
`->` S + have/has + (not) + Vpp + O.
`->` Bị động: S + have/has(not) + been + Vpp + (by O)
