chỉ cần xác định thì ở mấy câu bị gạch

tiện cho t xin cấu trúc thì luôn ạ

`1.` was studying

`2.` were they doing

`3.` met

`4.` taught

`5.` didn't go

`6.` was working

`7.` gave

`8.` were playing

`9.` bought

`10.` was doing

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$\text{*Structure: Past Simple:}$ (thì Quá khứ đơn)

`-` Đối với đt thường:

$\text{(+) S + Ved/V2 + ...}$

$\text{(-) S + did not + -bare + ...}$

$\text{(?) Did + S + V-bare + ...?}$

`-` Đối với đt tobe

$\text{+) S + was/were + ...}$

$\text{(-) S + was/were not + ...}$

$\text{(?) Was/were + + ...?}$

`-` `DHNB:` yesterday, ago, last night, last Sunday/Monday/Tuesday/...

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$\text{*Structure: Past Continuous: }$ (thì quá khứ tiếp diễn)

$\text{(+) S + was/were + V-ing + ...}$

$\text{(-) S + was/were not + V-ing + ...}$

$\text{(?) Was/Were + S + V-ing + ...?}$

`DHNB:` at `+` giờ `+` thời gian trong quá khứ, at this time `+` time in the past, in `+` năm,... $chucbanhoctot$

$\boxed{\color{purple}{\text{#KaitoKid!}}}$