本文目錄一覽1，關(guān)于doubt用法的選擇題2，doubt的單復(fù)數(shù)用法3，doubt后什么時候用if何時用whether4，doubt的用法5，doubtif和doubtwhether的區(qū)別用法是什么1，關(guān)于doubt用法的選擇題Thedoubtthatwhethershepassedtheexamwillsoonbeclear.這里是同位語Anydoubtpleasefeelfreetocontact這個就不是了2，doubt的單復(fù)數(shù)用法作“疑問”的意思，一般用單數(shù)：ThereisnodoubtthatA...