改一般疑问句和否定句.
1、Is the red bag yours?The red bag isn't mine.
2、Are the rulers hers?The rulers aren't hers.
3、Do you like blue?I don't like blue.
4、Does she do homework at 7:00.She doesn't do homework at 7:00.
5、Did they swim in summer last year?They didn't swim in summer last year.
希望我的回答能够帮到你,