`1.` It's over a year since we last visited our hometown.

`->` CT : S + haven't/hasn't + Vpp + ... + for time

`=` It's + time + since + S + (last) + V-ed/c2 + ...

`2.` When did they get married ?

`-` How long is it + since + S + V-ed/c2 + ... ?

`=` When + did + S + V-inf + ... ?

`3.` By 11a.m tomorrow , Mac Kenzie will hav finished his presentation.

`-` By + time : gần mấy giờ

`4.` The last time we went to a party was over a year ago.

`-` S + haven't/hasn't + Vpp + ... + for time

`=` The last time + S + V-ed/c2 + ... + was + time

`5.` This is the first time I have been to an Indian restaurant.

`-` S + haven't/hasn't + Vpp + ... + before

`=` This is the first time S + have/has  + Vpp + ...

`6.` When we were having diiner , there was a knock at the door.

`-` When + S + was/were + V-ing + ... , S + V-ed/c2

`-` Diễn tả 1 hành động đang xảy ra thì 1 hành động khác xen vào.

`1,` It's over a year since we last visited our hometown.

- It's + thời gian + since + S + (last) + Ved/V2 + O 

= S + has/have + not + Vpp + O + for + thời gian

- Đã hơn một năm kể từ lần cuối chúng ta thăm quê hương.

`2,` When did they last get married?

- How long is it since + S + Ved/V2 + O?

= When + did + S + (last) + V-inf + O?

`3,` By 11 am tomorrow , Mac Kenzie will have finished his presentation.

- before + time :  trước mấy giờ đó 

= by + time : cho đến khi mấy giờ 

- Thì TLHT : S + will + have + Vpp + O 

`4,` The last time we went to a party was over a year ago.

- The last time + S + Ved/V2 + O + was + time

= S + has/have + not + Vpp + O + for/since + time

- be to + địa điểm = go to + địa điểm : đi đến đâu đó

`5,` This is the first time I have been to an Indian restaurant.

- This/It is the first time + S + has/have + Vpp + O

= S + has/have + not + Vpp + O + before

= S + has/have + never + Vpp + O + before

`6,` There was a knock at the door when we were having dinner.

- Thì Quá Khứ Đơn kết hợp thì Quá Khứ Tiếp Diễn diễn tả 1 hành động đang xảy ra thì bị 1 hành động khác xen vào. (hành động xen vào chia QKĐ)
- When + S + was/were + V-ing , S + was/were + ....

- in the middle of sth : ở giữa của cái gì