Công thức:

Thể phủ định thì hiện tại đơn : $Subject+do/does+not+Verb_1+Ocject$

Thể nghi vấn thì hiện tại đơn: $Do/Does+Subject+Verb_1+Ocject?$

Thể phủ định thì HT tiếp diễn: $Subject+tobe+not+Verb_ing+Ocject$

Thể nghi vấn thì HTTD: $Tobe+subject+Verb_ing+Ocject?$

Trong đó:

$Subject$ là chủ ngữ

$Do/Does$ là trợ động từ

$Verb_1$ là động từ thường

$Ocject$ là Vị ngữ

Bài 1:

1.

(-) Lan doesn't often go to the library after school

(?) Does Lan often go to the librery after school?

2.

(-)There aren't 35 students in my class

(?) Are threre 35 students in my class?

3.

(-) Jennie doesn't really like action movie 

(?) Does Jennie like action movie very much?

4.

(-) Lan isn't cooking dinner with her mother at the moment

(?) Is Lan cooking with her mother at the moment?

5. 

(-) They don't often do their homework before going to school

(?) Do they often do their homework before going to school?

6. 

(-) Hoa isn't studying English with her friend now

(?) Is Hoa studying English with her friend now?

$1$.

$(-)$ Lan doesn't often go to the library after school

$(?)$ Does Lan often go to the librery after school ?

$2$.

$-)$ There aren't 35 students in my class

$?)$ Are threre 35 students in my class ?

$3$.

$-)$ Jennie doesn't really like action movie 

$?)$ Does Jennie like action movie very much ?

$4$.

$-)$ Lan isn't cooking dinner with her mother at the moment

$?)$ Is Lan cooking with her mother at the moment ?

$5$. 

$-)$ They don't often do their homework before going to school

$?)$ Do they often do their homework before going to school ?

$6$. 

$-)$ Hoa isn't studying English with her friend now

$?)$ Is Hoa studying English with her friend now ?

$-$CT thì HTD:

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

$-)$ S + don't/doesn't + V-inf

$?)$ Do/Does + S + V-inf ?

$-$ CT thì HTTD

$+)$ S + is/are/am + V-ing

$-)$ S + is/are/am + not + V-ing

$?)$ Is/Are/Am + S + V-ing ?