高考常用單詞之易混詞匯:weather,if用法區(qū)別

字號(hào):


    weather, if
    當(dāng)“是否”解時(shí),只有在賓語從句中二者可以互換,其余都用weather;例:I don't know if/whether he will come.
    當(dāng)“如果”解時(shí)用if 例:If he comes, I'll let you know.