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专四必备语法:名词性从句

宣布工夫:2015-11-22内容泉源:VOA英语学习网

十四、复合句——名词性从句

一个句子起名词的作用,在句中做主语、宾语/介词宾语、表语、同位语,那么这个句子便是名词性从句。

1.what/whatever的用法

考生应掌握:what是干系代词,它起着引导从句并在从句中继承一个身分这两个作用。如:

They lost their way in the forest, and what made matters worse was that night began to fall.

(what既引导主语从句又在从句中做主语)

Water will continue to be what it is today—next in importance to oxygen.

(what既引导表语从句又在从句中做表语)

2.whoever和whomever的区别

whoever和whomever相称于anyone who,用主格与宾格取决于其在从句中做主语照旧做宾语。如:

They always give the vacant seats to whoever comes first. (whoever在从句中做主语)

3.有关同位语从句的题目

(1)引导词通常为that, 但偶然因名词内容的需求,也可由whether及衔接副词why, when, where, how引导。that不表现任何意义,其他词表现工夫、所在、缘由等。如:

The problem, where I will have my college education, at home or abroad, remains untouched.

(2)同位语从句偶然与先行词离隔,留意辨认。如:

Evidence came up that specific speech sounds are recognized by babies as young as 6 months old.

4.whether与if在引导名词性从句时的区别

(1)主语从句只能用whether引导;

(2)whether普通多用于宾语从句的一定式,而if引导的从句可以有否认式;

(3)whether or not可以连在一同用,而if or not则不克不及,or not只能放在句末;

(4)whether可以引导介词宾语从句,if则不克不及;

(5)宾语从句提至谓语后面时,只能用whether引导;

(6)在question, ask前面普通只用whether,question的同位语从句也用whether引导;

(7)后接不定式时,只能用whether。

5.动词believe, expect, fancy, imagine, suppose, think后的宾语从句如为否认式,普通将否认词转移到主句谓语上。

 

来自:千亿国际文娱网页版_千亿国际文娱|www.qy449.com 文章地点: http://www.tingvoa.com/html/20151122/297375.html