及物动词不需要介词
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在英语错误中,“及物动词＋介词＋宾语”（transitive verb+preposition+object）,是常见的一种.所谓及物动词,就是谓语动词（predicative verb）,不必通过介词引荐宾语.相反的,不及物动词（intransitive verb）是不带宾语的.有许多动词,虽然性质是及物的,但不一定要有宾语,如下列的①a和②a便是这种情形：
①a.We study every day.
b.Do you study English every day.
②a.Please write clearly next time.
b.Can you write your composition now?
如果本质上就是不及物动词,就不会有宾语；若要宾语,就要借介词之助,一起连用才行,如③b和④b;③a和④a是错的；
*③a.The children are listening the music.
b.The children are listening to the music.
*④a.She is laughing the crippled man.
b.She is laughing at the crippled man.
反之,及物动词不必靠介词,就可以带宾语,如上述的①b和②b ,又如⑤和 ⑥：
⑤ John is giving a book to me.
⑥ Who will answer this question?
如果无意中把介词加上,就错了,如：
*⑦ Who will answer to this question?
下列这句从房地产广告中看到的句子,也犯了同样的错：
“We have many buyers awaiting for available units here.”
“Awaiting”是个及物动词,后面的介词“for”是多余的,要去掉；不然把“awaiting”改为“waiting for”也行.
许多人习惯上喜欢把介词加到及物动词后面,然后才带出宾语.最常见的是“emphasize/stress on/upon”和“discuss about”,如：
⑧ Singaporeans seem to have emphasized on material gains.
⑨ In our education system,we stress upon examination results.
⑩ World leaders spent a lot of time discussing about worsening economic problems.
显然的,这三句里的介词“on/upon”和“about”是多余的,不必要的.
下面是些类似的错误：
● The young must obey to their elders.
● Do not approach to that odd-looking man.
● The audience attacked on the rude speaker.
● Nothing can escape from his parents' eyes.
● Do you hope to serve for your nation?
● When did Susan marry with Paul?
介词“to,on,from,for,with”都要去掉才对.
为什么会有这些错误呢?主因是分不清楚及物动词和不及物动词的性质.其次,就是对同一个动词及其名词的句型有些混淆.解决之道有二.第一,要把“及物动词＋宾语”和“不及物动词＋介词＋宾语”划分清楚,如：
I did not answer him./ I did not reply to him.
He reached Londan yesterday./ He arrived in London yesterday.
第二,把及物动词转化为名词,然后加上适当的介词和宾语,如：
Don't approach such a person.
Is oral practice a good approach to language teaching?
-----------------------------------------------------------------------------------------------------及物动词表示一个动作,其后有动作的承受者,即有宾语.
不及物动词表示一个状态,其后没有承受者,即不能有宾语.
它们都可以作谓语用,但不及物动词没有被动语态.如：
He hurt his leg when he fell.这里hurt 是及物动词
My leg hurts.我的腿有点痛.这里hurt 是不及物动词 .