七、it的用法

　　1.指代一個人或事物。

　　Its only a fifteen-minute ride to my school.

　　It often rains in the south of China.

　　“Whos that?” “Its Liming.”

　　Its early spring.

　　2.作句子的形式主語，代替不定式、動名詞或從句。

　　It took me five minutes to finish reading the exercise.

　　It cost me five yuan to buy the pen.

　　The color TV set costs me more than 2，000 yuan.

　　I spent ten hours in finishing the work.

　　I spent twenty yuan on the shirt.

　　It is no use crying now. Youd better study hard now.(it is no use doing sth. )

　　To his surprise， it turned out that Tom failed the entrance examination.(to ones surprise 使某人感到驚奇)

　　Its a pity that you didnt watch the match.

　　It is necessary for us to have some exercise every day.

　　3.作句子的形式賓語，代替不定式、動名詞或從句。

　　They all regard it their duty to help the poor people.

　　I dont think it worthwhile taking so much trouble.(Its worthwhile doing. 做……事是值得的)

　　We find it difficult to learn English without practicing.

　　I think it no use telling them.

　　I dont think it very important that we should take part in the discussion.(take part in 參加)

　　He feels it his duty to help others.

　　4.構(gòu)成強調(diào)句型。當強調(diào)的部分是主語，并且主語是人時，句型中的that 也可以換作who.

　　強調(diào)句基本構(gòu)成 it is that…

　　It is in the room that we met each other for the first time.

　　It was not until 1936 that basketball became a part of the Olympic Games.(not until 直到……才)

　　It was they who attended the meeting last week.

　　It is because the book is so useful for my work that I bought it.

　　考試重點

　　that和those有時分別用來代表前面提到的不可數(shù)名詞和名詞復數(shù)，以避免重復。而可數(shù)名詞單數(shù)往往用the one 或that one 來代替。that 可以指上面提到的事情，this指下面要談的事情。

　　不定代詞中，both 放在實意動詞前，系動詞be 的后面。every只能跟名詞，each可以跟名詞也可以不跟名詞。every在代詞部分要出現(xiàn)當每隔……講。

　　few， a few， many 修飾或指代可數(shù)名詞，little， a little， much修飾或指代不可數(shù)名詞。few， little表示否定。

　　one the other，some others，the others

　　it用法重點就是強調(diào)句。it作為形式賓語時不接is.

　　代詞部分的難點之一是名詞型物主代詞與形容詞型物主代詞的區(qū)別。顧名思義，形容詞型物主代詞起的是形容詞的作用，在句子中只能作定語，名詞型物主代詞起的是名詞的作用，代替上文出現(xiàn)的名詞，在句子中一般作主語、賓語、表語等。

　　Lets clean their room first and ______ later.

　　A. our B. us C. we D. ours

　　(答案為D，ours 相當于our room.)

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