Áp dụng thì quá khư đơn:

Động từ tobe:

`+)` S + was/ were.

`-)` S + was/were not + V (nguyên thể).

`?)` Was/Were+ S + V(nguyên thể)?

Động từ thường:

`+)` S + V-ed

`-)` S + did not + V (nguyên thể)

`?)` Did + S + V(nguyên thể)?

`1.` took

`2.` arrived, weren't

`3.` said, bought

`4.` taught 

`5.` started , was

`6.` donated

`7.` rung

`8.` did you watch

`9.` was, used to

`10.` did you go

`11.` wasn't, didn't fell

`12.` spent 

`13.` wrote, didn't write

`14.` were they

`15.` saw

 took

arrived, weren't

said, bought

taught 

 started , was

donated

did you watch

was, used to

did you go

wasn't, didn't fell

spent 

wrote, didn't write

were they

saw