1.look看,  laugh笑,嘲笑,  ask问,  answer回答,  shout大喊,  work工作,  wait等待,  visit拜访,参观,  travel旅行.

2.Are you ………ing? 你正在……….吗?

   Yes, I am./No, I am not. 是的./不是.

   Are you looking?  Yes, I am.

   Are you laughing?  No, I am not.

   Are you asking?  Yes, I am.

   Are you answering?  No, I am not.

   What are you doing? 你正在做什么?

   I am ………..ing. 我正在..............

   What are you doing?

   I am looking.

   I am laughing.

   I am asking.

   I am answering.

3.Is he/she ………ing? 他/她正在……….吗?

   Yes, he/she is./No, he/she isn’t. 是的./不是.

   Is he waiting?  Yes, he is.

   Is he working?  No, he isn’t.

   Is she traveling?  Yes, she is.

   What is he/she doing? 他/她正在做什么?

   He/She is ………..ing. 他/她正在..............

   What is he doing?

   He is shouting.

   What is she doing?

   She is visiting.

   What is he doing?

   He is waiting.