`5.`

`-` It’s six months since Mary last met her uncle

`-` The last time Mary met her uncle was six months ago

`6.`

`-` It’s two months since I last visited my grandparents

`-` The last time I visited my grandparents was two months ago.

`12.` It’s two years since he last went swimming

`-` S `+` have/has `+` not `+` VPII `+` for `+` khoảng thời gian

`=` It `+` be `+` khoảng thời gian `+` since `+` S `+` last `+` V(qkđ)

`=` The last time `+` S `+` V(qkđ) `+` was `+` khoảng thời gian `+` ago

`***` Khi nào có `13` thì bảo ạ.

`FrozenQueen`

`5` It's six months since Mary last met her uncle.

`-` The last time Mary met her uncle was six months ago.

`6` It's two months since I last visited my grandparents.

`=` The last time I visited my grandparents was two months ago.

`12` It's two years since he last went swimming.

`======`

`-` S + has/have + not + PII + for + khoảng thời gian: ai chưa làm gì trong vòng bao lâu

`=` It + is/has been + khoảng time + since + clause (QKĐ): đã là bao lâu kể từ lúc ai làm gì

`=` The last time + clause (QKĐ) + was + khoảng thời gian + ago: lần cuối ai làm gì là khi nào