• When we were at school we all studied Latin.

• When I met him, he had been working as a waiter for a year.

• After he finished breakfast, he sat down to write some letters.

• She has had a hard life, but she's always smiling.

• I think Jim is out of town.

31. When we __were__ at school we all __studied__ Latin. ⇒ Cấu trúc: When + QKĐ, QKĐ

32. When I __met__ him, he __had been working__as a waiter for a year. ⇒ Cấu trúc: When + QKĐ, QKHT.

33. After he __had finished__ breakfast he __sat__down to write some letters.

34. She ___has___a hard life, but she's always smiling. ⇒ không có thời gian nhất định, dùng HTHT

35. I think Jim __has been__

31. were - studied

32. met - had been working

33. had finished - sat

34. has

35. has been