A.Then I saw a person crossing the road at the zebra crossing. |
B.Then I see a person cross the road at the zebra crossing. |
A.I eat in a Chinese restaurant last night. |
B.I ate in a Chinese restaurant last night. |
A.I see my mother doing the housework. |
B.I see my mother do the housework. |
A.Where do you go last Sunday? |
B.Where did you go last Sunday? |