Công thức thì HTĐ (V: tobe)

(+) S + am/is/are ..

(-) S + am/is/are + not .. 

(?) Am/Is/Are + S + ... ? 

I + am

S số ít, he, she, it + is

S số nhiều, you ,we, they + are

Công thức thì HTĐ (V: thường)

S số ít, he, she, it 

(+) S + Vs/es

(-) S+ doesn't + V1 

(?) Does +S +V1?

S số nhiều, I, you, we, they

(+) S + V1 

(-) S+ don't + V1 

(?) Do + S+ V1? 

DHNB: always, usually, sometimes, often, never, seldom,....

-----------------------------------------------

1. Tom never forgets to do his homework.

ADV chỉ tần suất + V 

forget + to V :quên làm gì 

2. I rarely use my mobile phone in the classroom.

ADV chỉ tần suất + V 

use sth: sử dụng cái gì 

3. Does he always play football after school?

ADV chỉ tần suất + V 

play + môn thể thao mang tính đồng đội, có cạnh tranh 

4. The students don't often ride their bicycles to school.

ADV chỉ tần suất + V 

ride sth to sw: lái cái gì đến đâu 

5. Susan sometimes helps her mother to do the housework.

ADV chỉ tần suất + V 

help + sb + to V / V: giúp ai làm gì

6. Are you usually at home in the evening? 

to be + ADV chỉ tần suất 

`color{orange}{~MiaMB~}`

1. Tom never forgets to do his homework.

2. I rarely use my mobile phone in the classroom.

3. Does he always play football after school?

4. The students don't often ride their bicycles to school.

5. Susan sometimes helps her mother to do the housework.

6. Are you usually at home in the evening?

--------

- HTĐ(DHNB: rarely, usually, always, never)

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

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

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