there is a pear in the basket.改成否定句
问题描述：
there is a pear in the basket.改成否定句
答
there isn't a pear in the basket.there is a pear in the basket.改成疑问句并回答is there a pear in the basket? yes,there is./ no,there isn't.多谢啦There are twenty boys in the playground 改成否定句There aren't twenty boys in the playground.
类似这样的否定句，在系动词后面直接加not就可以了。There are twenty boys in the playground 改成疑问句并回答Are there twenty boys in the playground? yes ,there are/ no ,there aren't.