`-` Thì QKĐ:

`@` Động từ tobe:

`(+)` S+ was/ were+ adj/ N

`(-)` S+ was/ were+ not+ adj/ N

`(?)` Was/ Were+ S+ adj/ N+...`?`

`@` Động từ thường:

`(+)` S+ Ved/ V2

`(-)` S+ did+ not+ V

`(?)` Did+ S+ V+...`?`

`13`. had

`14`. was

`15`. visited

`16`. were

`17`. bought

`18`. saw

`19`. ate

`20`. talked

`21`. worked

`22`. did you live

`23`. didn't study

`24`. traveled

`25`. Did they visited

`26`. didn't watch

`27`. bought

`28`. did you teach

`29`. didn't think

`30`. cooked 

`31`. Did Lucy read

`32`. didn't write 

`33`. had

`34`. did you go

`35`. loved

`36`. didn't meet

`13.` had (last year: DH thì QKĐ)

`14.` was (last summer: DH thì QKĐ)

`15.` visited (last January: DH thì QKĐ)

`16.` was (last week: DH thì QKĐ)

`17.` bought (two days ago: DH thì QKĐ)

`18.` saw

`19.` eate (yesterday: DH thì QKĐ)

`20.` talked (yesterday: DH thì QKĐ)

`21.` worked (ren yeard ago: DH thì QKĐ)

`22.` did you live (when you were: DH thì QKĐ)

`23.` didn't study

`24.` traveled (last year: DH thì QKĐ)

`25.` Did they visit (yesterday: DH thì QKĐ)

`26.` didn't watch (yesterday: DH thì QKĐ)

`27.` bought (last weekend: DH thì QKĐ)

`28.` did you teach (when you came: DH thì QKĐ)

`29.` didn't think (he was: DH thì QKĐ)

`30.` cooked (last night: DH thì QKĐ)

`31.` Did Lucy read (last week: DH thì QKĐ)

`32.` didn't write (last week: DH thì QKĐ)

`33.` had (when I was: DH thì QKĐ)

`34.` did you go (last holiday: DH thì QKĐ)

`35.` loved (when I was: DH thì QKĐ)

`36.` didn't meet (yesterday: DH thì QKĐ)

`->` Cấu trúc thì Quá khứ đơn:

`-` với động từ:

`(+)` S + Ved/V2

`(-)` S + didn't + V

`(?)` Did + S + V?

`-` với tobe:

`(+)` S + was/were

`(-)` S + wasn't/weren't

`(?)` Was/Were + S...?