A.表示过去做过:加-ed
He worked(played football)(cleaned the room)yesterday.
I repaired(installed)(checked)the TV yesterday.
还有:
get>got I got up at 6 o'clock yesterday.
go>went I went to work early yesterday.
come>came He came to the hotel yesterday.
tell>told He told me to come yesterday.
B.表示没有做:did not或didn't
We didn't work yesterday=We did not work yesterday.
He didn't play football(clean the room)yesterday.
I didn't get up at 6 o'clock yesterday(on Friday)(on Monday).
I didn't go to work early last week(yesterday)(last month).
Example
It rained last Saturday>It didn't rain last Saturday.
We installed the heater>We didn't install the heater.
Mr Li arrived yesterday>Mr Li didn't arrive yesterday.
C.表示疑问:Did you…?
Did you fix the air-conditioner(TV)(computer)?
Did Lulu help her mother(her friend)(her sister)?
Did the manager(Mr Li)(the guest)tell you to go?
还有:
What did you do?刚才你做什么了?
Where did you go?刚才你去哪里了?
What time did you go there?你什么时间去那的?
……
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