Only if a teacher has given permission is a student allowed
1个回答

这是 only if 引导的倒装句,意思是“只有老师同意,学生才能够离开房间.”

你断句错了喔,应该是Only if a teacher has given permission / is a student allowed to leave the room.(原语序应该是a student is allowed to leave the room,但是倒装句要把动词提到前面,所以就变成了is a student allowed to leave the room)