QKĐ:
-I was a teacher
-He was good
-They studied English
-She flied to Hong Kong.
QKTD:
-I was being a teacher
-He was being good.
They were stuying English
-She was flying to Hong Kong.
HTHT:
-I have been a teacher
-He has been good
-They have studied English
-She has flied to Hong Kong
QKHT:
-I had been a teacher
-He had been good
-They had studied English
-She had flied to Hong Kong
TLĐ
-I will be a teacher
-He will be good
-They will study English
-She will fly to Hong Kong
TLG:
-I am going to be a teacher.
-He is going to be good.
-They are going to study English
-She is going to fly to Hong Kong