上册Unit131高一英语课件

而whether可以， Please see if the children are dressed for school2 If 不和or not 直接连用，Unit 13 language pointsA If 和whether 表示“是否”时的区别1在动词后引起宾语从句时可以互换， He didn’t say if he would be staying here or not Please tell me whether or not you agree3 与不定式连用只能用whether I don’t know whether to answer it (，