1Peter played soccer yesterday then had a bath => after...................... => beore...................... 2 we had had dinner last sunday before we went to the movies => after....................... 3 our teachers have explained the english grammar => the english grammar.............. 4 some drunk drivers caused the accident in this city => the accident.............. 5they cut grass in the garden then they cooked lunch => after.......

`-` Quá khứ hoàn thành diễn tả hành động xảy ra trước hành động khác trong quá khứ

`+` Hành động xảy ra trước chia ở thì quá khứ hoàn thành

`+` Hành động xảy ra sau chia ở thì quá khứ đơn

`-` Cấu trúc thì quá khứ hoàn thành:

$(+)S + had + Ved/V2$

`-` Dấu hiệu nhận biết: $before, after,$ $by$ $the$ $time,...$

`1` Peter played soccer yesterday then had a bath.

`->` After Peter had played soccer yesterday, he had a bath.

`->` Before Peter had a bath, he had played soccer yesterday.

`2.` We had had dinner last Sunday before we went to the movies.

`->` After we had had dinner last Sunday, we gone to the movies.

`3.` Our teachers have explained the English grammar.

`->` The English grammar has been explained by our teachers.

`-` Bị động của thì hiện tại hoàn thành

$(+) S + have/has + been + V3$

`4.` Some drunk drivers caused the accident in this city.

`->` The accident was caused in this city by some drunk drivers.

`-` Bị động của thì quá khứ đơn

$(+) S + were/was + V3$

`-` Trạng từ chỉ nơi chốn đứng tước "by + O"

`5.` They cut grass in the garden then they cooked lunch.

`->` After they had cut grass in the garden, they cooked lunch.