Helen is playing the violin now.改为否定句:改为一般疑问句:肯定回答:否定回答:

问题描述:

Helen is playing the violin now.改为否定句:改为一般疑问句:肯定回答:否定回答:

否定句:Helen is not playing the violin now.
一般疑问句:Is Helen playing the violin now?
肯定回答:Yes,she is.
否定 :No,she isn't.