When was the boy playing over there ?
反意疑问句:Lucy was helping her mother this time on sunday,wasn't she?
提问:Who was Lucyhelpingthis time on sunday?Kate was reivewing her lessons at eight last night改为一般疑问在做肯定和否定的回答~~Was Katereivewing her lessons at eight last night?肯定回答:Yes,she was. 否定回答:No,she wasn't.