四年级上册英语语法知识点
语法知识对于英语尤为重要,那么四年级上册的英语语法知识有哪些呢?一起来看看吧,希望对大家有所帮助!
缩写与完全形式的转换
let’s = let us who’s = who is where’s = where is what’s = what is it’s = it is he’s = he is she’s = she is I’m = I am can’t = can not don’t = do not isn’t = is not aren’t = are not they’re = they are doesn’t = does not
反义词类
big(反义词)small / little short(反义词)tall / long strong(反义词)weak / thin new(反义词)old / young fat(反义词)thin open(反义词) close turn on (反义) turn off right(反义)wrong / left like (反义词)hate heavy (反义词)light
名词变复数规则
1、一般情况下直接在名词词尾加上-s。
eg: book— books dog — dogs cake — cakes
2、以 s , x , sh, ch结尾的名词,在名词后面加上 - es。 eg: bus — buses class — classes glass — glasses box — boxes fox — foxes wish(希望) — wishes fish(鱼)— fishes watch(手表)— watches
3、以辅音字母+y结尾的名词,变y为i再加上-es。 story(故事)stories candy (糖果)— candies
4、以 f 或者fe结尾的名词,变 f / fe 为v 再加上- es。
eg:knife (小刀)— knives wolf(狼)— wolves
动词变化doing(现在分词/动名词)的规则
1、一般在动词词尾加上- ing。
eg:play(玩)— playing 【特殊】 see (看见) — seeing
clean(打扫)— cleaning help(帮助)— helping eat(吃)— eating turn(转变)—turning
2、以字母e 结尾的动词,把e 去掉再加上-ing。
eg:come(来)— coming like(喜欢)— likng
have(有)— having love(喜欢)— loving take(拿走)— taking
3、以一个..元音字母加上一个..辅音字母结尾的动词,一般情况下,双写该辅音字母再加上 -ing。
eg:put(放)— putting swim(游泳)— swimming
hop(跳高)— hopping
注意
1、have (第三人称单数)has like(第三人称单数)likes speak(第三人称单数)speaks
2、speak + 某种语言 表示:“说……语言”
3、There + be + 某物 + 某处 表示:“某处有某物”
4、五个元音字母:
Aa Ee Ii Oo Uu
元音音素开头的单个可数名词前要用冠词an