四年级下英语知识点
小学英语的词汇学习是小学四年级英语学习的重点,也是中年级英语学习的难点。接下来学习啦小编为你整理了四年级下英语知识点，一起来看看吧。
四年级下英语知识点:反意疑问句
1) 陈述部分的主语是I，疑问部分要用 aren't I.
I'm as tall as your sister，aren't I?
2) 陈述部分的谓语是wish，疑问部分要用may +主语
I wish to have a word with you, may I?
3) 陈述部分用 no, nothing, nobody, never, few, seldom, hardly, rarely, little等否定含义的词时，疑问部分用肯定含义
The Swede made no answer, did he / she?
Some plants never blown (开花), do they ?
4) 含有ought to 的反意疑问句，陈述部分是肯定的，疑问部分用shouldn't / oughtn't +主语
He ought to know what to do, oughtn't he? / shouldn't he?
5) 陈述部分有have to +v. (had to + v.)，疑问部分常用don't +主语(didn't +主语)
We have to get there at eight tomorrow, don't we?
6) 陈述部分的谓语是used to 时，疑问部分用didn't +主语或 usedn't +主语
He used to take pictures there, didn't he? / usedn't he?
7) 陈述部分有had better + v. 疑问句部分用hadn't you?
You'd better read it by yourself, hadn't you?
8) 陈述部分有would rather +v.，疑问部分多用 wouldn't +主语
He would rather read it ten times than recite it, wouldn't he?
9) 陈述部分有You'd like to +v. 疑问部分用wouldn't +主语
You'd like to go with me, wouldn't you?
10) 陈述部分有must 的疑问句，疑问部分根据实际情况而定
He must be a doctor, isn't he?
You must have studied English for three years, haven't you? / didn't you?
He must have finished it yesterday, didn't he?
11) 感叹句中，疑问部分用be +主语
What colours, aren't they?
What a smell, isn't it?
12) 陈述部分由neither… nor, either… or 连接的并列主语时，疑问部分根据其实际逻辑意义而定
Neither you nor I am engineer, are we?
13) 陈述部分主语是指示代词或不定代词everything, that, nothing, this, 疑问部分主语用it
Everything is ready, isn't it?
14) 陈述部分为主语从句或并列复合句，疑问部分有三种情况
a. 并列复合句疑问部分，谓语动词根据邻近从句的谓语而定。
Mr. Smith had been to Beijing for several times, he should have been in China now, shouldn't he?
b. 带有定语从句，宾语从句的主从复合句，疑问部分谓语根据主句的谓语而定：
He is not the man who gave us a talk, is he?
He said he wanted to visit Japan, didn't he?
c. 上述部分主句谓语是think, believe, expect, suppose, imagine等引导的定语从句，疑问部分与宾语从句相对应构成反意疑问句。
I don't think he is bright, is he?
We believe she can do it better, can't she?
15) 陈述部分主语是不定代词everybody, anyone, somebody, nobody, no one等，疑问部分常用复数they，有时也用单数he
Everyone knows the answer, don't they?(does he?)
Nobody knows about it, do they? (does he?)
16) 带情态动词dare或need的反意疑问句，疑问部分常用 need (dare ) +主语
We need not do it again, need we ?
He dare not say so, dare you?
当dare, need 为实义动词时，疑问部分用助动词do + 主语。
She doesn't dare to go home alone, does she?
17) 省去主语的祈使句的反意疑问句，疑问部分用will you
Don't do that again, will you?
Go with me, will you / won't you ?
注意： Let's 开头的祈使句，后用shall we?
Let us 开头的祈使句，后用will you?
Let's go and listen to the music, shall we?
Let us wait for you in the reading-room, will you ?
18) 陈述部分是"there be"结构的，疑问部分用there省略主语代词
There is something wrong with your watch, isn't there?
There will not be any trouble, will there?
19) 否定前缀不能视为否定词，其反意疑问句仍用否定形式
It is impossible, isn't it?
He is not unkind to his classmates, is he?
20) must在表"推测"时，根据其推测的情况来确定反意疑问句
He must be there now, isn't he?
It must be going to rain tomorrow, won't it?
四年级下英语知识点:必背句型
1、This is a red skirt. 这是一条红色的短裙。(单数)(划线部分要会替换)
2、These are yellow trousers.这些是红色的裤子。(复数)(划线部分要会替换)
3、He/She is wearing a green sweater. 他/她穿着一件绿色的毛衣。(划线部分要会替换)
He/ She is wearing blue trousers. 他/她穿着一条蓝色的裤子。(注意裤子是复数形式，wearing后面不需要加冠词a)
4、This is a new sweater.这是一件新毛衣。(单数)
5、This is an old sweater. 这是一件旧毛衣。(单数)(注意：old 中字母o是元音字母，前面需要使用冠词an)
6、These are new trousers.这些是新裤子。(复数)
7、These are old trousers.这些是旧裤子。(复数)
8、I like your trousers.我喜欢你的裤子。
9、Are they new? Yes, they are. /No, they aren’t.他们是新的吗?是的。/ 不，不是。(复数)
Is it new? Yes, it is./ No, it isn’t. 它是新的么?是的。/ 不，不是。(单数)
10、What is she wearing? She is wearing a green sweater, an orange skirt and a brown scarf.她穿着什么? 她穿着一件绿色毛衣，桔色短裙和棕色围巾。
11、Is this your cap? No! It’s Kim’s cap.这是你的帽子吗? 不，这是Kim的帽子。
12、Are these your gloves? No, they aren’t .这些是你的手套吗? 不是。
13、What day is today? It’s Monday. 今天星期几? 今天星期一。(划线部分要会替换)
14、How many days are there in a week? 一周有几天?Seven. 七天。
15、What do you do in the evening?你晚上做什么?(划线部分要会替换)
In the evening , I do my homework./I write a story. / I read a book. /I draw a picture for my story .我晚上做作业。/写故事。/读书。/给我的故事画图。
16、What do you do at home? 你在家干什么?
I help my mum and my dad. / I talk on the phone with my friends./ I watch TV after dinner. /I play on the computer. 我帮我的爸爸妈妈。/我和朋友打电话。/我晚饭后看电视。/我玩电脑。
17、What do you do in your bedroom? 你在你的卧室做什么?(划线部分要会替换)
I make my bed. /I clean my bedroom. /I play with my teddy bear. /I listen to music. 我整理我的床铺。/ 我打扫房间。/我和我的泰迪熊玩。/我听音乐。
18、What do you do in the morning? 你早上做什么?(划线部分要会替换)
I brush my teeth. / I wash my face. /I brush my hair. /I put on my clothes.我刷牙。/洗脸 梳头。/穿衣服。
四年级下英语知识点：感叹句结构
感叹句通常有what, how引导，表示赞美、惊叹、喜 悦、等感情。
what修饰名词，how 修饰形容词，副词或动词
感叹句结构主要有以下几种：
How +形容词+ a +名词+陈述语序
How+形容词或副词+陈述语序
What +名词+陈述语序
What+a+形容词+名词+陈述语序
What+ 形容词+复数名词+ 陈述语序
What+ 形容词+不可数名词+ 陈述语序
How clever a boy he is!
How lovely the baby is!
What noise they are making!
What a clever boy he is!
What wonderful ideas (we have)!
What cold weather it is!
感叹句的省略形式为：
What a clever boy (he is)!
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