过去式的句子改成否定的时候单词要不要去ed?
问题描述：
过去式的句子改成否定的时候单词要不要去ed?
My dad studied at Cambridge University.
改成否定句是
My dad didn't studied at Cambridge University.
还是My dad didn't studi at Cambridge University.
1 My dad studied at Cambridge University.
2 Chloe wanted some new trainers.
3 Mum drank her coffee quickly.
4 We met our friends at the cinema.
5 I knew the answer to the teacher's question.
6 Mum and dad bought me an MP3 player for my birthday.
过去式改否定
答
要去1 My dad didn't study at Cambridge University.2 Chloe didn't want some new trainers.3 Mum didn't drink her coffee quickly.4 We didn't meet our friends at the cinema.5 I didn't know the answer to t...