` 1 ` : meet

` - ` Ta chia thì HTĐ : S + Vs/es

` DHNB ` : everyday

` 2 ` : was

` - ` QKĐ tobe : S + was /were + ...

` DHNB ` : last vacation

` 3 ` : is playing

` - ` Ta chia thì HTTD : S + Be + V-ing

` 4 ` : didn't

` - `QKĐ phủ định: S + didn't +V Nguyên mẫu

`DHNB ` : last night

` 5 ` : When : khi nào

` 6 ` : visited

` - ` QKĐ :S + V-ed /V2

` DHNB ` :last summer vacation 

` 7 ` : goes

` - ` Ta chia thì HTĐ : S + Vs/es

` DHNB ` : sometimes

` 8 `  : were

` - ` QKĐ tobe : S + was /were + ...

` 9 ` : bought

` - ` QKĐ :S + V-ed /V2

` DHNB ` : yesterday

`1.` meet

`\text{HTĐ: S + V(s/es) + (O)}`

nhận bik: everyday

`2.` was

`\text{QKĐ vs be: S + was/were +....}`

nhận bik: last vacation

`3.` is playing

`\text{HTTD: S + am/is/are + Ving + (O).}`

`4.` didn't

`\text{QKĐ: S + didn't + Vinf + (O).}`

nhận bik: last night

`5.` When

`6.` visited

`\text{QKĐ: S + Ved/VPI + (O).}`

nhận bik: last summer

`7.` goes

`\text{HTĐ: S + V(s/es) + (O)}`

nhận bik: sometimes

`8.` were

`\text{QKĐ vs be: S + was/were +....}`

nhận bik: when

`9.` bought

`\text{QKĐ: S + Ved/VPI + (O).}`

nhận bik: yesterday