語法複習專題(11)
unit11 名詞性從句
一、考點聚焦
1、名詞性從句中連線詞的運用
名詞性從句中的連線詞有連詞that / whether / as if,連線代詞what / who/ which / whose / whatever / whoever / whomever / whichever,連線副詞where / when / why / how / wherever / whenever。
(1)that的用法。
①主語從句、表語從句、同位語從句中用that但不能省略。如:
that they are good at english is known to us all.
the problem is that we don』t h**e enough money.
she expressed the hope that they would come to china one day.
②賓語從句中的連線詞that有時可省有時又不可省,在以下幾種情況中that不能省略:(a)當that從句和主句謂語動詞之間有插入詞語或者從句主語之間有插入語時,that不可省略;(b)當that 從句與另一名詞性從句並列作賓語時,that不能省;(c)當that作介詞賓語時,that不可省掉。如:
he judged that,because he was a child, he did not understand
wine
everyone knew what happened and that she was worried.
the reason lies in that she works harder than the others do.
③that從句作主語和賓語時,可以用it 來替換成以下幾種結構表達。
(a)it is clear/certain/likely/true/surprising that… (b)it is a pity/shame/good idea/no wonder that ...(c)it is said/reported/ believed/known/thought/suggested that … (d)it seems/happens that。如:
it happened that i went out last night.
it is said that china will win in the world cup.
④that和what的區別。
that 引導名詞性從句時,在主從句中不以當任何句子成分,也沒有任何含義;而what引導名詞性從句時,在主從句中都要充當一定的句子成分,what可以分解成定語從句中的先行詞 + 關係代詞即常說的先行詞 + that。如:
it』s shame that he has made such a mistake. do what he says.
⑤同位語從句與定語從句中that的區別。
同位語從句中的連詞that只起連線作用,在從句中不擔當任何句子成分;而定語從句中的關係代詞that在句中做賓語或主語,賓語與先行詞有修飾關係。如果句子是同位語從句,就應用連詞that而不能用which.同位語從句一般放在表具體含義的名詞後解釋名詞的含義或內容,如以下名詞:
news、fact、suggestion、truth、plan、belief、doubt、possibility、idea等,而定語從句只是對先行詞的限定和修飾。如:
they expressed the hope that they would come to visit china again.(同位語從句)
the hope she expressed is that they would come to visit china again.(定語從句)
(2)whether和if的用法。
①whether和if在賓語從句中可以互換,但是作介詞賓語時連線詞一般用whether。如:
it all depends on whether they will come back.
②後面直接跟or not 時用whether。如:
i didn』t know whether or not he had arrived in wuhan.
③主語從句表語從句中只能用whether。如:
whether the meeting will be put off has not been decided yet.
the question is whether they h**e so much money.
④whether可以引導同位語從句,用以說明前面的名詞的內容,if不能。如:
we ought to discuss carefully the question whether we can do
it or not.
⑤whether常與or連用表示一種選擇,if不能這樣用;whether也可與動詞不定式連用但if不能。如:
the question of whether they are male or female is not impor-
tant.
i h**e not decided whether to go or not.
⑥間接引語位於句首時或者是間接引語提前時用whether不用if。如:
thank you, but whether i』ll be free i』m not sure at the moment.
⑦whether可引導乙個讓步狀語從句表示「不管」、「無論」,而if不能。如:
whether he comes or not, we will begin our party on time.
(3)疑問詞 + ever和no matter + 疑問詞的區別。
①疑問詞 + ever可引導名詞性從句,在主從句中要充當一定的部分。如:
whoever breaks the rule must be punished.
you can choose whatever you like in the shop.
②疑問詞 + ever還可引導讓步狀語從句。如:
whoever breaks the rule, he must be punished,
whatever you do, you must do it well.
③no matter + 疑問詞只能引導讓步狀語從句。如:
no matter what you do, you must do it well.
no matter who breaks the rule, he must be punished.
(4)when和where引導的同位語從句與定語從句的區別。
when 和where前面的名詞若是表示時間、地點的名詞,則when和where引導的是定語從句,否則則為同位語從句。如:
they put forward the question where they could get the money.
this is the place where the accident happened.
2、名詞性從句中主句和從句的時態一致
(1)賓語從句中主句和從句的時態保持一致,但如果從句中表示提示的是客觀現象,雖然主句是過去時態,從句仍用一般現在時。如:
hello,i didn』t know you were in london. how long h**e you been here?
the teacher told us that light tr**els at a very high speed.
(2)主語從句作主語相當於單數第三人稱作主語,謂語動詞用單數,如果由and 連線兩個或兩個以上的主語從句作主語時,謂語動詞用複數;由兩個或多個連線詞引導乙個主語從句,謂語動詞用單數。如:
when the meeting will begin has not been decided yet.
when they will start and where they go h**e not been decided yet.
when and where the meeting will begin has not been decided.
3、名詞性從句的詞序
名詞性從句在句中要用陳述句語序。如:
he asked me what was the matter with me.
we』ve heard the news that we』ll move into the new house.
whatever you say will interest us all.
二、精典名題導解
選擇填空
1. a computer can only doyou h**e instructed it to do.(nmet 2001)
解析:答案為c。本題考查的是名詞性從句作賓語的用法。此句的引導詞既作連詞又在賓語從句中充當一成分,故what最合適。
2. —i drove to zhuhai for the air show last week..
—is thatyou had a few days off ? (nmet 99)
解析:答案為a。此題考查的是從句的用法。
根據題意「我上週開車去珠海看航空展去了。」下面一句接著問:「那就是你為什麼離開的原因嗎?
」故用why引導表語從句表示原因。
3. i hatewhen peope talk with their mouths full.(nmet 98)
解析:答案為a。本題考查的是形式賓語的用法。
題意為「我討厭人們談話時嘴裡塞滿東西」。該空白處沒有任何含義,而且已經用了when連線該賓語從句,所以此處只填乙個形式賓語it。
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