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

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

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.