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Công thức câu nghi vấn thì quá khứ đơn: (W/H)+did +S + V(inf)..?

1.When did you buy that table?
2.How much did your new computer cost?
3.What did you do after school yesterday?
4.Why didn't you call me last night?
5.Where did Dad save photos on the computer?

`1.` When did you buy that tablet?

`2.` How much did your new computer cost?

`3.` What did you do after school yesterday?

`4.` Why didn't you call me last night?

`5.` Where did your Dad save the photos on the computer?

`-----`

Thì Quá khứ đơn

- Dấu hiệu thì QKĐ: last week/year/..; yesterday, in + thời gian QK,...

`(+)` S + Ved/ V cột `2` + O

`(-)` S + didn't + Vo + O

`(?)` Did + S + Vo + O?

Was/Were + S + Adj/N ?