Đáp án:

`1.` is never

`2.` often clean

`-` vì có "often" dấu hiệu thì HTĐ

`-` Cấu trúc: S + V(s/es)..

`3.` hardly ever helps

`-` vì có "hardly ever " dấu hiệu thì HTĐ

`-` Cấu trúc: S + V(s/es)..

`4.` is sometimes (chưa chắc nha)

`5.` rarely watch

`-` có " rarely" dấu hiệu thì HTĐ

`-` Cấu trúc: S + V(s/es/)

`6.` never play

`-` vì có "never" dấu hiệu thì HTĐ

`-` Cấu trúc: S + V(s/es)..

`7.` are usually

`8.` always arrives

`-` có " always" dấu hiệu thì HTĐ

`-` Cấu trúc: S + V(s/es/)..

`9.` often cleans

`-` có " often" dấu hiệu thì HTĐ

`-` Cấu trúc: S + V(s/es/)

`10.` is sometimes

`-` có " sometimes" dấu hiệu thì HTĐ

`-` Cấu trúc: S + V(s/es/)..

`11.` never wears

`-` có " sometimes" dấu hiệu thì HTĐ

`-` Cấu trúc: S + V(s/es/)..

`12.` usually does

`-` có " usually" dấu hiệu thì HTĐ

`-` Cấu trúc: S + V(s/es/)..

`13.` always takes

`-` có " always" dấu hiệu thì HTĐ

`-` Cấu trúc: S + V(s/es/)..

1. Is never

2. Often clean

3. Hardly ever helps

4. Am sometimes

5. Rarely watch

6. Never play

7. Are usually

8. Always arrives

9. often cleans

10. is sometimes

11. never wears 

12. usually does 

13. always takes

Cấu trúc: (I/We/They) + tobe + tần suất + Vinf

                 (He/She/It) + tobe + Tần suất + V(s/es)

I tobe là am

He/She tobe là is

We/They tobe là are