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特殊疑问句：疑问词+一般疑问句？
Ask and answer questions
What were you doing at this time yesterday ?
I was _______________
What was he/ she doing at this time yesterday ?
He / She was _______________
having classes .
having classes
fly kites
go swimming
go fishing
read books
二、句子结构
1、概念：表示过去某个时刻正在进行的动作和过去某段时间内持续进行的动作。
2、结构：
肯定句：主语+was/were +现在分词（v+ing）+其它。
否定句：主语+ was/were +not +现在分词+其它
暴风头脑
1）play 2) dance 3) run
watch take get
fly have swim
walk make put
playing
watching
flying
walking
dancing
taking
having
making