defend against 中的defend是vt还是vi?

问题描述:

defend against 中的defend是vt还是vi?
defend against 中的defend是做及物动词,还是不及物动词?看例句:Prepare to defend against aerial attacks!例句中defend直接跟介词,是做不及物动词吗?但有的句子中 defend+宾+介 不是做及物动词吗?

defend是不及物动词,后接介词against
defend against防卫,保卫;抵抗
Citibank spokesman said:"We believe this lawsuit is without merit and we will defend against it vigorously.
一位花旗银行的发言人说:“我们相信这份诉讼是没有价值的,而我们会积极地辩护.
也可以用作及物动词:(defend后加宾语)
He has hired a lawyer to defend him against the allegation.
他已聘请一位律师为他所受的指控辩护.
defend vt.辩护;防护 vi.保卫;防守