Hewasblownoffcourse.中blowoff不是不及物动词怎有被动语态,course是可数名词,为什么不加a、the

Question

He was blown off course .中blow off 不是不及物动词怎有被动语态,course是可数名词,为什么不加a、the

Answer 1

不及物动词可以做被动啊,比如：
例1：
I have taken care of this matter.
--This matter has been taken care of (by me).
例2：
We have found out his whereabouts.
--His whereabouts have been found out (by us).
其实,被动语态的使用往往有其特殊的意义和语境,我们通常所做的英语练习,目的也纯粹是为了练习而已.具体到语态的使用,还是要看当时的语境.基本的差别在于,你想要强调什么.如上例中,主动语态在于突出“我”处理好了这件事,而被动语态在于强调“这件事”已经处理妥当,因此原句的主语通常由于不那么重要而省略（by me/by us).
off course ,一个词组,指不在规定的轨道上.给你个例句：
Whatever it was had thrown her Dodge off course as she rounded a sharp curve.
就在她急转弯时,不知是什么东西使她的车脱离了车道.
The entire region 's economic boom could be off course .
整个地区的经济繁荣将迅速脱离方向.