【问】 葛老在《英语惯用法词典》(P.334)中说：“注意下面第一句里用‘I know it’，第二句用‘I know’：

He is going to get married，and I know it.

When his sister said that he was going to get married，I said，‘Yes，I know.’”

但是，我不明白为什么第一句子用I know it，而在第二个句子里用I know。

【答】 根据现代英语语法学家的解释，在英国英语中用I know，而在美国英语中用I know it.

I. I asked when she was leaving，and she said she didn’t know.

我问她什么时候走，她说她不知道。

(know后面的成分未出现，可用省略来解释。)

2. His father came here yesterday.-Yes，I know. (Palmer)

他父亲昨天来了。——是的，我知道。

3. I reconstructed the crime and before I had finished speaking，Boyle said，‘A tissue oflies!’I asked the accused if he really thought so and he answered，‘Think so? I knowit!’(LEG)

我描述了那桩罪行，博伊尔没等我说完就喊道：“连篇的谎言!”我问被告是否真的这么想，他回答说：“这么想?我知道那是谎言!”