It代替從句作形式主語的常見句型
1. it 代替連詞 that 引導的從句作形式主語。
1) it + be + 過去分詞 + that 從句:
It's said that Tom has come back from abroad .
It was reported that dozens of children died in the accident .
可用於該句型的過去分詞還有：known , thought , told , believed , hoped , announced ,expected , decided , suggested等，該句型常可以轉換成含有賓語從句的複合句或者含有不定式作主補的簡單句。如：
→People say that Tom has come back from abroad . →He is said to have come back from abroad .
2) It + be + 名詞片語 + that 從句:
It's a pity that he can't swim for his age .
It's a wonder that you could finish such a hard task in such a short time .
可用於該句型的名詞片語還有：an honour , a good thing , a fact , a surprise , good news等。
3) It + be /seem + 形容詞 + that 從句:
It is likely that they will beat us tonight .今晚很可能他們會贏我們。
It doesn't seem that she will give us a hand .她幫我們的可能性似乎不太大。
可用於此句型的開容詞還有；wonderful , true , good , right , wrong , (un)important ,useless , surprising , clear , possible , unusual , lucky , certain 等。
4) It + seem / appear / happen + that 從句:
It seems that he enjoys pop songs very much .看來他非常喜歡流行歌曲。
It appears that Tom might change his mind .看來湯姆會改變主意。
It happened that I went out that day .碰巧我那天外出了。
2. it 代替連線代詞或連線副詞引導的從句作形式主語。
1) It is known (not decided , not made clear , found out , discussed , being discussed , being considered , a question , uncertain等) + 連線代詞或連線副詞引導的從句。
It is still a question when we shall have our sports meet . 我們將什麼時候舉行運動會還是一個問題。
It is uncertain whether he can attend this conference or not . 他能否來開會還不能確定。
2) It doesn't matter(doesn't matter too much , doesn't make too much difference等) + 連線代詞或連線副詞引導的從句。如：
It doesn't matter whether we go together or separately . 我們一起去還是分開去都可以。
It doesn't matter too much to me what you do or where you go . 你做什麼或去什麼地方，對我都無關緊要
It代替從句作形式主語的常見句型
1. it 代替連詞 that 引導的從句作形式主語。
1) it + be + 過去分詞 + that 從句:
It's said that Tom has come back from abroad .
It was reported that dozens of children died in the accident .
可用於該句型的過去分詞還有：known , thought , told , believed , hoped , announced ,expected , decided , suggested等，該句型常可以轉換成含有賓語從句的複合句或者含有不定式作主補的簡單句。如：
It's said that Tom has come back from abroad .
→People say that Tom has come back from abroad . →He is said to have come back from abroad .
2) It + be + 名詞片語 + that 從句:
It's a pity that he can't swim for his age .
It's a wonder that you could finish such a hard task in such a short time .
可用於該句型的名詞片語還有：an honour , a good thing , a fact , a surprise , good news等。
3) It + be /seem + 形容詞 + that 從句:
It is likely that they will beat us tonight .今晚很可能他們會贏我們。
It doesn't seem that she will give us a hand .她幫我們的可能性似乎不太大。
可用於此句型的開容詞還有；wonderful , true , good , right , wrong , (un)important ,useless , surprising , clear , possible , unusual , lucky , certain 等。
4) It + seem / appear / happen + that 從句:
It seems that he enjoys pop songs very much .看來他非常喜歡流行歌曲。
It appears that Tom might change his mind .看來湯姆會改變主意。
It happened that I went out that day .碰巧我那天外出了。
2. it 代替連線代詞或連線副詞引導的從句作形式主語。
1) It is known (not decided , not made clear , found out , discussed , being discussed , being considered , a question , uncertain等) + 連線代詞或連線副詞引導的從句。
It is still a question when we shall have our sports meet . 我們將什麼時候舉行運動會還是一個問題。
It is uncertain whether he can attend this conference or not . 他能否來開會還不能確定。
2) It doesn't matter(doesn't matter too much , doesn't make too much difference等) + 連線代詞或連線副詞引導的從句。如：
It doesn't matter whether we go together or separately . 我們一起去還是分開去都可以。
It doesn't matter too much to me what you do or where you go . 你做什麼或去什麼地方，對我都無關緊要