`6. B`

`-` often `-` HTĐ

`-` HTĐ: `(+)` S + V(s/es) + O
`-` I + V_inf

`7. C`

`-` at present `-` HTTD

`-` HTTD: `(+)` S + am/is/are + V_ing + O
`8. C`

`-` this weekend `-` HTTD

`-` HTTD: `(+)` S + am/is/are + V_ing + O
`-` she + is

`9. A`

`-`  often `-` HTĐ

`-` HTĐ: `(-)` S + do/does + not + V_inf + O

`-` at the moment `-` HTTD

`-` HTTD: `(+)` S + am/is/are + V_ing + O

Đáp án: + Giải thích các bước giải:

`6)`

`to` Chọn `B`

`-` Có on Sundays `to` HTĐ

`( + )` S + Vs/es + O

`-` S là I `to` V (nt)

` 7)`

`to` Chọn `C`

`-` Có at present `to` HTTD

`( + )` S + am/is/are + V-ing

`-` S là I `to` am

`8)`

`to` Chọn `C`

`-` Có this weekend `to` HTTD

`-` S là she `to` is

`9)`

`to` Chọn `A`

`-` Có often `to` HTĐ

`( - )` S + do/does not + V + O

`-` Có at the moment `to` HTTD

`-` S là they `to` are

`#Ph`