$\text{1.}$ is singing

$\text{→}$ Listen! chia HTTD

$\text{2.}$ go

$\text{→}$ every night chia HTD

$\text{3.}$ likes - like

$\text{4.}$ are staying

$\text{→}$ now chia HTTD

$\text{5.}$ reads

$\text{→}$ every morning chia HTD

$\text{6.}$ is running

$\text{→}$ Look! chia HTTD

$\text{7.}$ listens - isn't listening

$\text{→}$ usually chia HTD

$\text{→}$ now chia HTTD

$\text{8.}$ is - is - is watching

$\text{→}$ now chia HTTD

$\text{9.}$ Are they going

$\text{→}$ today chia HTTD

$\text{10.}$ are

$\text{11.}$ doesn't go

$\text{→}$ everyday chia HTD

$\text{12.}$ go - go

$\text{→}$ rarely chia HTD

$\text{13.}$ am writing

$\text{→}$ now chia HTTD

$\text{14.}$ have - go

$\text{→}$ every day chia HTD

$\text{15.}$ have

$\text{→}$ on Monday chia HTD

$\text{16.}$ have

$\text{→}$ on Friday chia HTD

$\text{17.}$ am eating - are playing

$\text{→}$ at the moment chia HTTD

$\text{18.}$ is looking - is eating

$\text{→}$ now và at present chia HTTD

$\text{19.}$ are

$\text{20.}$ Does - walk

$\text{→}$ everyday chia HTD

1.is singing

2go

3.likes/likes

4.are staying

5.reads

6.is running

7.listens/isn't listening

8.is/is/is watching

9.Are/going

10are

11doesn't go

12go/go

13am writing

14have/go

15have

16have

17am eating/are playing

18is looking/is eating

19are

20Does/walk

Thì hiện tại đơn diễn tả hành đông,sự việc thường xuyên xảy ra hoặc lặp lại do thói quen 

Thì hiện tại tiếp diễn tả hành động diễn ra vào lúc đang nói ở hiện tại