句子的种类
1.英语中按使用目的或功用分为四类:陈述句、疑问句、祈使句、感叹句。
A.陈述句。
○1 陈述句说明一个事实或陈述一个人的看法。陈述句分为肯定陈述句和否定陈述句两种。
a.陈述句的肯定式。I have already posted the photos. / They are students. / I must go now . / He was reading a book at 8:00 last night.
b.陈述句的否定形式。
谓语动词是系动词be, 助动词have, will, shall, be或情态动词,只须在其后面加not构成否定句。
She isnt a student . / He hasnt been to the Great Wall . / I can not swim . / You will not go there tomorrow. / They arent sleeping .
若谓语动词是实义动词,在实义动词前加上do not,第三人称单数现在时用does not,过去时用did not。
He didnt send me an invitation .
由具有否定含义的词never, nobody, hardly, little, dislike, seldom, few, tooto等构成的否定句。
Not all the books in our school library can be renewed .
B. 疑问句。
○1 疑问句提出问题。英语中有四种疑问句:一般疑问句、特殊疑问句、选择疑问句和反意疑问句。
a.一般疑问句:以一个助动词、情态动词、动词be或have开始,语调为升调,通常要求以yes或no回答的疑问句。
一般疑问句的基本结构:
Be动词(is, am, are, was, were)+主语+表语?
Have动词(表示有:have, has, had)+主语+宾语?
情态动词(can, may, must等)+主语+行为动词或be?
助动词(do, does, did)+主语+行为动词?
助动词(shall, will, have, has)+主语+行为动词?
否定形式的疑问句,通常把助动词与not缩写,放在句首。构成回答:
Arent you a student? Yes, I am .(不,我是) No, I am not .(对,我不是)
b.特殊疑问句:以疑问代词who, what, whom, whose, which或疑问副词when, where, why, how开头。
如果疑问词在句中作主语或其修饰主语时,其语序如陈述句。Who is on duty today ? / Which book is yours .
如果疑问词在句中不作主语或其修饰主语,用疑问词+一般疑问句形式。Where have you been ?
c.选择疑问句:提出两种或两种以上的情况,供回答者选择,并由or连用,但不能用Yes或no 来回答。
疑问句+选择成分1+or+选择成分2?Do you want coffee or cocoa ? / Are you an Englishman or an American ?
特殊问句+选择答案1+or+选择答案2?who runs fast, Tom , Mary or Li lei .
d.反意疑问句:陈述部分+提问部分。
◎前肯后否,前否后肯。 ◎前后人称、数和时态要一致,疑问部分要用代词。◎事实回答用Yes, 非事实回答用No . ◎前陈述句用降调,后问句用升调;如对前陈述句内容有把握,后问句也可用降调。◎如果前面陈述句中有否定词:hardly, little, few, never, rarely, nothing, none , nobody, not, no 等,后面疑问句应该用肯定式。
陈述句中有:have to, had to, ought to, used to, dont(imperative), somebody / someone, everybody / everyone时,附加疑问句需分别用:dont, didnt, shouldnt, usednt / didnt, will, they等。
My grandma used to be a teacher, usednt / didnt she ? Dont turn on the TV set, will you ?
陈述句部分是复合句时,提问部分的主语和助动词要与主句一致。He was reading when the teacher came in, wasnt he ?
在I think(guess, suppose, believe)+宾语从句中,当主语是第一人称时,附加疑问句的主语和谓语应与后面宾语从句相一致;但若主语不是第一人称时,则附加问句与前面主句一致。
I dont think he can pass the exam, can he ? He believed you had seen her before, didnt he ?
在含有情态动词must 的句子中,若must 表示推测,提问用must后面的动词。若must表示有必要时,用neednt。若mustnt表示禁止时,提问用must。
He must be tired, isnt he ? You must go to Gaozhou, neednt ? You mustnt smoke here, must you ?
陈述句部分为祈使句,疑问部分常用will you(表请求)。注:lets 用shall we,let us 用will you。Have a cup of tea, will you ? Lets go now, shall we ? Let us go now, will you ?
e.祈使句:可表示请求、命令、劝告、建议等。
let + 第一人称,第三人称+动词原形。Let me try again .
动词原形+其他成分。Listen to me carefully .
Dont (never)+动词原形+其他成分。Dont look out of the window .
Do+动词原形+其他成分。Do give him another chance .
f.感叹句:表示喜怒哀乐等强烈感情,句尾用!。What 修饰名词,how 修饰形容词、副词。
How + 形容词 / 副词。
◎ How + 形容词 + 主 + 谓 + ooo ! How cold it is today ! How clever the boy is !
◎ How + 副词 + 主 + 谓 + ooo ! How fast she runs ! How hard the girls are working !
◎ How + 形容词 + a / an + 名词 + 主 + 谓 + ooo !How clever a boy he is ! How funny an elephant it is !
What + 名词。
◎ What + a / an + 形容词 + 可数名词单数+ 主 + 谓 + ooo ! What a fine day it is today !
What an honest man his father is !
◎ What + 形容词 + 可数名词复数 + 主 + 谓 +ooo!What tall trees they are !What good students the boys are !
◎ What + 形容词 + 不可数名词 + 主 + 谓 + ooo !What cold water it is ! What delicious milk it is !
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