$1.$ By the tie we got there, the meeting had already started.

$2.$ By the time I arrived, the film had started.

$3.$ Before I passed the exam, I had worked very hard.

$4.$ After she had lived in China, she went to Thailand in 1998.

$5.$ By the time I went to my friend's house, she had gone to bed.

$6.$ Before Jane went home, she had gone to the supermarket.

*Cấu trúc cho toàn bài:

- Kết hợp thì quá khứ đơn và thì quá khứ hoàn thành để diễn tả một hành động đã xảy ra và kết thúc trước một hành động khác trong quá khứ:

  + Hành động xảy ra trước dùng thì quá khứ hoàn thành.

  + Hành động xảy ra sau dùng thì quá khứ đơn.

`1` By the time we got there, the meeting had already started

`2` By the time I arrived, the film had started

`3` Before I passed the exam, I had worked very hard

`4` After she had lived in China, she went to Thailand in 1998

`5` By the time I went to my friend's house, she had gone to bed

`6` Before Jane went home, she had gone to the supermarket

Giải thích

`->` Cấu trúc : By the time + thì QKĐ , thì QKHT

`->` Cấu trúc : Before + thì QKĐ , thì QKHT

`->` Cấu trúc : After + thì QKHT , thì QKĐ