2011暑假必備寶典之高一英語知識(shí)點(diǎn)總結(jié)Unit15-16(13)
2011-07-11 17:35:05高考網(wǎng)整合
4. 祈使句+ and + 陳述句結(jié)構(gòu)
在這種句子結(jié)構(gòu)中,祈使句表示條件,陳述句表示結(jié)
果,它相當(dāng)于If you..., you will...,另外,祈使句+
or + 陳述句結(jié)構(gòu)表示:If (not)..., you will,有時(shí)候,
祈使句中的動(dòng)詞可省略。
Work harder, and you'll find it not difficult to learn.
再用功一點(diǎn),你就會(huì)發(fā)現(xiàn)它不難寫。
Hurry up, or you will be late.
快一點(diǎn),否則你會(huì)遲到。
More effort, and you can finish it in time.
再加把勁,你會(huì)按時(shí)完成它。
【句型歸納】
【考點(diǎn)1】Pierre and I did have a very good time at the
ball. 皮埃爾與我確實(shí)在舞會(huì)上玩得很開心。
該句中的did為助動(dòng)詞,加強(qiáng)謂語動(dòng)詞have的語氣。
在“助動(dòng)詞do / does / did + 動(dòng)詞原形”結(jié)構(gòu)中,助動(dòng)詞
do / does / did意思是“確實(shí),的確,一定”。常常用在
肯定句或祈使句中,起加強(qiáng)語氣的作用。有人稱和時(shí)
態(tài)的變化。例如:
Do send me e-mail immediately you arrive at Beijing. 你
一到北京,一定要給我發(fā)電子郵件。
He does smoke two packs of cigarettes every day. 他確
實(shí)每天抽兩包煙。
The company earned much more this month than it did
last month. 公司本月賺的錢要比上個(gè)月多得多。
【考例1】(NMET 2000) An awful accident____,
however, occur the other day.
A. does B. did
C. was to D. had to
[考查目標(biāo)] 對(duì)句子中謂語的強(qiáng)調(diào)。
[答案與解析] B 助動(dòng)詞do (does用于第三人稱) 用于
對(duì)現(xiàn)在時(shí)態(tài)的強(qiáng)調(diào);did用于對(duì)過去時(shí)態(tài)的強(qiáng)調(diào),后面
均接動(dòng)詞原形。
【考點(diǎn)2】In the eighteenth century, Benjamin Franklin
conducted a number of experiments in which he showed
what electricity is. 18世紀(jì)。本杰明·富蘭克林做了一系
列的試驗(yàn),以證明電是什么。
注意:該句子中的a number of 作主語,謂語動(dòng)詞用復(fù)數(shù)
形式。例如:
A number of children play video games online. 很多的
孩子在網(wǎng)上玩電子游戲。
a number of意思是“許多,數(shù)目”,作主語時(shí),謂語動(dòng)詞
用復(fù)數(shù)形式。the number of意思是“數(shù)量”,作主語時(shí),
謂語動(dòng)詞用單數(shù)形式。例如:
A number of people prefer to sending e-mail each other
t0 writing letters. 許多人更愿意發(fā)電子郵件,而不愿意
寫信。
The number of milu deer is increasing year by year. 麋
鹿的數(shù)目在逐年增加。