當that引導的主語從句或賓語從句太長時,常用it作形式主語或賓語而把that從句放在後面.下面是小編整理的相關內容，歡迎大家閱讀參考！
從句中that的用法
一、that引導名詞性從句時(即主語從句、賓語從句、表語從句、同位語從句),在從句中無具體含義,只起連線作用,而且在從句中也不作任何句子成分.它所引導的從句的句子結構和意義是完整的,而且從句一般是陳述一個事實.
例如:
①Thatshe was able to come made us very happy.
她能來使我們很高興.
②The newsthatour team has won the match is true.
我們隊贏了這場比賽的訊息是真的.
③The reason he didn't come wasthathe was ill.
他沒來的原因是他病了.
當that引導的主語從句或賓語從句太長時,常用it作形式主語或賓語而把that從句放在後面.如:
①It is well—knownthatthe earth is round.
眾所周知,地球是圓的.
②We find it necessarythatwe practise spoken English every day.
我們發現每天練習英語口語很有必要.
注意：
that引導的主語從句,表語從句以及同位語中,that不能省略引導的賓語從句,一般可以省去that,但在下面情況中不能省略——
1.在suggest,order等表示命令、請求、建議等動詞後的賓語從句中,不能省;
2.由and或but所連線的兩個引導的`賓語從句時,第一個從句中的that可以省,第二個從句中的that不能省;
引導的賓語從句,如果從句中還有其他狀語從句,引導賓語從句的that不能省略.
Tell himthatif he is at home,I'll call to see him.
二,that引導定語從句要注意以下幾點:
1.定語從句中缺主語,修飾人時用who /that,修飾物時用which /that引導.如:
Is this the factory which /thatmakes TV sets
The man who /thatvisited our school is from Australia.
2.從句中缺賓語,修飾人時用 who /whom /that或省略引導詞;修飾物時用which /that或省略引導詞.如:
Gone are the days which /thatwe spent together in the village.
He is the man who /whom /thatI think to be worthy of our praise.
3.用that不用which的七種情況:
①先行詞前有形容詞最高階或序數詞修飾時,用that不用which引導.如:
This is the best placethatI have ever visited.
②先行詞為little,much,all,none,few,(the)one,something,everything,nothing,anything等不定代詞時,用that引導.如:
There is nothing in the worldthatcan frighten him.
③先行詞既有指人的名詞又有指物的名詞時,用that引導.如:
He told us about the people and the citiesthathe had visited.
④先行詞前有any,all,no,few,every,some,little,much,(the)very,(the)only,(the)last等詞修飾時,用that引導.如:
This is the very coatthatI need.
⑤先行詞為which時,為了避免重複,用that引導.如:
Which is the bookthatyou bought yesterday
⑥先行詞在從句中作表語時,常用that引導.如:
Shanghai is no longer the citythatit used to be in the 1930's.
⑦當主句是There be...句型時,用that引導.
There are two tickets for the filmthatare for you two.
