He has a school trip on May 15th.(改为一般疑问句

He has a school trip on May 15th.(改为一般疑问句 He has a school trip on May 15th 改为一般疑问句? Our class has a school trip on May 4th.改为否定句怎么改?对时间提问成疑问句呢? They went on a school trip.(改为一般疑问句) It was National Day yes They have a school trip on May 16th.对 May 16th提问 they have a school trip every year 改为一般疑问句 He has a School Day at his school. 改为一般疑问句 he has a pencil改为一般疑问句 We will go on a raft trip改为一般疑问句 I am going on a big trip.改为一般疑问句 He is going on a big trip.变一般疑问句. He has a sister.(改为一般疑问句) --------he-------a sister?