关于while的用法 Toby was watching TV while Tim____(do)his homework at 7 PM

分类: 作业答案 • 2021-12-29 14:38:55

问题描述：

答

while前后动词时态一致
不一定要动词,to do ,do都可 ,前后一致就行那用while引导不一定一定要用ing是吗是的。比如这句话也可以写Toby watched TV while Tim did his homework....