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2019高考英语备考 名词性从句

发布时间:2019-06-08

XX高考英语备考(考点聚焦+名题导解) 名词性从句

一、考点聚焦
    1、名词性从句中连接词的运用
名词性从句中的连接词有连词that / whether / as if,连接代词what / who/ which / whose / whatever / whoever / whomever / whichever,连接副词where / when / why / how / wherever / whenever。
(1)that的用法。[ks5u.com]
①主语从句、表语从句、同位语从句中用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 have enough money.
she expressed the hope that they would come to china one day.
②宾语从句中的连接词that有时可省有时又不可省,在以下几种情况中that不能省略:(a)当that从句和主句谓语动词之间有插入词语或者从句主语之间有插入语时,that不可省略;(b)当that 从句与另一名词性从句并列作宾语时,that不能省;(c)当that作介词宾语时,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从句作主语和宾语 时,可以用it 来替换成以下几种结构表达。
(a)it is  clear/certain/likely/true/surprising that… (b)it is a pity/shame/g ood idea/no wonder that ...(c)it is said/reported/ believed/known/thought/suggested that … (d)it seems/happens t hat。如:
it happened that i went out last night.
it is said that china will win in the world cup.
④that和what的区别。
that 引导名词性从句时,在主从句中不以当任何句子成分,也没有任何含义;而what引导名词性从句时,在主从句中都要充当一定的句子成分,what可以分解成定语从句中的先行词 + 关系代词即常说的先行词 + that。如:
it’s shame that he has made such a mistake. do what he says.
⑤同位语从句与定语从句中that的区别。
同位语从句中的连词that只起连接作用,在从句中不担当任何句子成分;而定语从句中的关系代词that在句中做宾语或主语,宾语与先行词有修饰关系。如果句子是同位语从句,就应用连词that而不能用which.同位语从句一般放在表具体含义的名词后解释名词的含义或内容,如以下名词:news、fact、suggestion、truth、plan、belief、doubt、possibilit y、idea等,而定语从句只是对先行词的限定和修饰。如:
they expressed the hope that they would come to visit china again.(同位语 从句)
the hope she expressed is that they would come to visit china again.(定语从句)
 (2)whether和if的用法。
①whether和if在宾语从句中可以互换,但是作介词宾语时连接词一般用whether。如:
it all depends on whether they will come back.
②后面直接跟or not 时用whether。如:
i didn’t know whether or not he had arrived in wuhan.
③主语从句表语从句中只能用whether。如:
whether the meeting will be put off has  not been decided yet.

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