第1个回答 2014-01-17
He's doing his homework.望采纳哦!新年快乐!
第2个回答 2014-01-17
He's doing his homework
这是现在进行时
He was doing his homework.
这是过去进行时
望采纳哦!本回答被网友采纳
第3个回答 2014-01-17
He is doing homework。
第4个回答 2014-01-17
He is doing his homework.
第5个回答 2014-01-18
他正在做作业:
He is doing his homework.