I see a man behind me(改一般疑问句) helen is good at singing(同义句)

问题描述:

I see a man behind me(改一般疑问句) helen is good at singing(同义句)

① I see a man behind me(改一般疑问句)
Do you see a man behind you
②helen is good at singing(同义句)
Helen does well in singing.