原句本身是肯定句呀!
变为否定句：He wasn't in the park yesterday.
she didn't play the violin last night.He didn't wash the clothes yesterday.I wasn't ill yesterday.There were not many things in it.They didn't go home at six.
变为一般疑问句及其回答：Was he in the park yesterday?Yes,he was./No,he wasn't.
Did she play the violin last night?Yes,she did./ No,she didn't.
Did he wash the clothes yesterday?Yes,he did./No,he didn't.
Were you ill yesterday?Yes,I was./No,I wasn't
Were there many things in it?Yes,there were./ No,there weren't
Did they go home at six?Yes,they did./No,they didn't.