`***` CT thì HTĐ với động từ thường:

`(+)` S + V(s/es)

`(-)` S + don't/doesn't + V-inf

`(?)` (WH-) + do/does + S + V-inf?

`-` Do/Don't đi với I, We, You, They, N số nhiều

`-` Does/Doesn't đi với He, She, It, N số ít

`***` CT thì HTĐ với tobe:

`(+)` S + is/am/are + N/adj

`(-)` S + isn't/am not/aren't + N/adj

`(?)` (WH-) + is/am/are + S + N/adj?

`-` I + am

`-` He/She/It/N số ít + is

`-` We/You/They/N số nhiều + are

`--------------`

`20.` don't have

`21.` Does she live

`22.` are

`23.` travel

`24.` often read

`25.` Does he work

`26.` Does the train arrive

`27.` Do you play

`28.` travel

`29.` Does his brother work

`30.` Does Mark work