1 I don't want to miss the train so I'm leaving now.

-> nguyên nhân - kết quả

-> thì HTTD 

-> ta có cấu trúc : S + be + V-ing 

2  haven't seen my uncle for 2 years.

-> ta có cấu trúc thì HTHT+ for : 

-> s + have / has + VPII + for + 1 quãng thời gian 

3 Jane stayed behind after the class because she wanted to talk to the teacher.

-> beacause : bởi vì 

-> dùng để nối hai vế lại với nhau 

4 They have never been to Korea before

-> thì HTHT 

-> có chữ before nhận bt 

-> ta có cấu trúc thì HTHT 

-> s + have / has + VPII 

5 When did you join Volunteers In Asia ?

-> thì QKĐ 

-> dùng để hỏi về thời gian làm cái gì của 1 ai đó 

-> sau did + v nguyên mẫu 

6 We encouraged people to recycle glass, cans and paper.

-> ta có cụm từ encouraged : động viên

1 I don't want to miss the train so I'm leaving now

2  I haven't seen my uncle for 2 years

3 Jane stayed behind after the class because she wanted to talk to the teacher

4 They have never been to Korea before

5 When did you join Volunteers In Asia 

6 We encouraged people to recycle glass, cans and paper

1 thì HTTD (  S + be + V-ing )

2thì HTHT+ for  ( S + have / has + VPII + for + TG )

3

4 thì HTHT  (S + have / has + VPII )

5 thì QKĐ (S + V2 + O )

6