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,....

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ADV chỉ tần suất + V 

tobe + ADV chỉ tần suất 

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1. I usually solve problems in Math class.

2. I never swim in Music class.

3. I sometimes read stories in Vietnamese class.

4. I often do experiments in Science class.

5. I rarely use computers in History class.

6. I sometimes make things in Art class.

7. I usually learn new words in English class. 

8. I usually draw and paint in Art class.

9. I sometimes play football in PE class.

10. I never run in IT class.

`color{orange}{~MiaMB~}`

#NgocMinh

`1` I usually solve problems in Math class
`2` I never swim in Music class

`3` I sometimes read stories in Vietnamese class
`4` I often do experiments in Science class
`5` I rarely use computers in History class
`6` I sometimes make things in Art class
`7` I usually learn new words in English class
`8` I usually draw and paint in Art class
`9` I sometimes play football in PE class
`10` I never run in IT class

`**`