2、问句:特殊疑问词+was/were+主语+doing+其它如:Whatwashedoingatsixlastnight?按要求句型转换:Mary was riding a bike at that time.否定句:__________________________________一般疑问句:______________________________两回答:__________________________________特殊疑问句:______________________________练习:按要求句型转换:Marywasridi