while和when放在句首和句中都一样吗?
问题描述：
while和when放在句首和句中都一样吗?
答
while,句首句中一样,但后面的动词是ing形式,有时态变化.
when句首句中一样,动词跟主语一致,有时态变化.也就是说这两个单词即可以放句首也可以放句中？嗯While we were talking, the teacher came in.
They were singing while we were dancing.