1.went,had done

2.rang,ran

3.had broken,ran

4.had known

5.arrived,had already gone

6.had met

7.hadn't heard,read

8.saw,had waved

9.had taken

10.had already given,got

11.had ever seen

12.hadn't eaten

13.had already begun

14.sat,rested

15.went,had finished

công thức của thì quá khứ hoàn thành S+had+V3/ed+O 

công thức của thì quá khứ đơn S+V2/ed+O

sau after chia quá khứ hoàn thành,vế còn lại chia quá khứ đơn

sau before chia quá khứ đơn,vế còn lại chia quá khứ hoàn thành

C1:

Went,had done

C2:

Rang,ran

C3:

Had broken,ran

C4:

Had known

C5:

Arrived,had already gone

C6:

Had met

C7:

Hadn't heard,read

C8:

Saw,had waved

C9:

Had taken

C10:

Had already given,got

C11:

Had ever seen

C12:

Hadn't eaten

C13:

Had already begun

C14:

Sat,rested

C15:

Went,had finished

          Xin ctlhn ạ