改为否定句：We were having a PE class at four yesterday afternoon.改：We __ __a PE class at four yesterday afternoon.

they were having an important meeting改为否定句 we are having dinner at school.改为否定句 改为否定句：We were having a PE class at four yesterday afternoon.改：We __ __a PE class at four yesterday afternoon. We were having a party when the rain started.(改为同义句) ________ we were having a party, therain _______. The students of Class 3 were having a class meeting then 改为否定句 the teacher were having a meeting in the hall at that time改为否定句 1.We were having a P.E class at four yesterday afternoon.(改为否定句)1.We were having a P.E class at four yesterday afternoon.(改为否定句)2.Kate was reviewing her lessons at 8 last night. 对（8 last night we were young否定句 It was fat 改为一般疑问句,并作否定回答 we were happy at new year.改为否定句.否定回答 We are having a good fime .改为一般疑问句并否定句回答 Today is Monday.(改为否定句）We are having a lesson now,(改为一般疑问句） we were having a party when the train started 用while 改为同义句while we ---- ---- a party ,the train ---- We were in the school library this afternoon.(改为否定句) We were good at sports.改为否定句（疑问句及回答） They were my friends 改为否定句 they were old then改为否定句 We were very happy to hear from our tercher改为一般疑问句 肯定回答 否定回答 否定句 We were very happy to hear from our tercher改为一般疑问句 肯定回答 否定回答 否定句