3 . do - spell . 

4 . is 

5 . is 

6 . isn't

7 . isn't 

8 . are 

9 . is 

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` -> `  `  HTĐ ` 

` ( + ) ` : S + Vs/es

` ( - ) ` : S + don't / doesn't + V nguyên mẫu

` ( ? ) ` : Do / does + S + v Nguyên mẫu

` ( + )  He / she / it + Is   

` - `    I + am   

` - `    You / we / they + are

` ( - ) ` He / she / it / tên riêng + isn't   

` - `    i + am   

` - `   You / we / they + aren't

` ( ? ) ` Is + he / she / it / tên riêng

` - ` Am + i ?

` - ` Are / they / we / you + ... ?

` 3 ` : do - spell

` 4 ` : is 

` 5 ` : is

` 6 ` : isn't

` 7 ` : isn't

` 8 ` : are

` 9 ` : is