1.He last spoke english in May(NOT)

sửa lại: He has not spoken english since May.

2. Tom has played guitar since he was thirteen. (SINCE)

sửa lại: Tom has been playing guitar since the age of thirteen.

3.My father started fixing his car in the morning. (SINCE)

sửa lại: My father has been fixing his car since the morning.

4Tom has run this restaurant for three years. (RAN)

sửa lại: Tom ran this restaurant three years ago.

5.She finished doing the test a few minutes ago. (JUST)

sửa lại: She just finished doing the test.

6.It has been two months since I moved to Saigon. (AGO)

sửa lại: I moved to Saigon two months ago.

7. Tom owned this car three years ago. (FOR)

sửa lại:Tom owned this car for three years.

8.Tom and Mary started working here three years ago. (FOR)

sửa lại: Tom and Mary have worked here for three years.