英语中动词vt,vi请教是不是英语中及物动词一定要跟宾语,并且直接跟宾语?而不及物动词后要一定加介词才能跟宾语,但也可没有宾语?碰到一个单词concern.为及物动词,查询了它的解释如下：1.涉及,关系到;影响到The letter is chiefly concerned with export commodities.这封信主要是关于出口商品的.The news concerns your brother.这消息与你兄弟有关.2.使担心;使不安[H][(+about/for)]He is concerned for her safety.他担心她的安全.3.使关心[H][(+about/with)]He was very concerned about her.2,3例句concern.为及物动词,怎么都跟了介词with,for,about呢?是固定词组还是?

英语中动词vt,vi
请教是不是英语中及物动词一定要跟宾语,并且直接跟宾语?
而不及物动词后要一定加介词才能跟宾语,但也可没有宾语?
碰到一个单词concern.为及物动词,查询了它的解释如下：
1.涉及,关系到;影响到
The letter is chiefly concerned with export commodities.
这封信主要是关于出口商品的.
The news concerns your brother.
这消息与你兄弟有关.
2.使担心;使不安[H][(+about/for)]
He is concerned for her safety.
他担心她的安全.
3.使关心[H][(+about/with)]
He was very concerned about her.
2,3例句concern.为及物动词,怎么都跟了介词with,for,about呢?是固定词组还是?