`1.` were - went

`2.` didn't go - stayed - did

`3.` Did you watch ... ?

`4.` took

`5.` weren't - was

`6.` left

`7.` told

`8.` didn't know - did

`9.` bought

`10.` was

--------------Quá khứ đơn-----------------

Với động từ tobe:

   `(+)` S + was / were + O

   `( - )` S + was / were + not + O

   `( ? )` Was / were + S + O?

Với động từ thường:

   `(+)` S + V-ed / 2 + O

   `( - )` S + did + not + V(bare) + O

   `( ? )` Did + S + V(bare) + O?

Dấu hiệu nhận biết:

   `-` ago

   `-` last

   `-` yesterday

   `-` in + [mốc thời gian trong qk] (ex: in 2013, ...)

=================================

`\text{@Bulletproof Boy Scout}`

1a, were
1b,went
2a,didn't go
2b,stayed
2c,did
3, Did you watch
4, took
5a,weren't
5b,was
6,left
7,told
8a, didn't know
8b,did
9, bought
10,was
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