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17 tháng 8 2019

1. The girl didn't be happy

\(\Rightarrow\)The girl wasn't happy
2. He didn't saw the wallet

\(\Rightarrow\)He didn't see the wallet
3. The dog and the cat was in the yard five minutes ago

\(\Rightarrow\)The dog and the cat were in the yard five minutes ago
4. Where your friends went picnic

\(\Rightarrow\)Where did your friends go picnic

Correct the mistake
1. The girl didn't be happy

=> wasn't
2. He didn't saw the wallet

see