四年级英语上册语法知识总结 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 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 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 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 1 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 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 2 本文来源:https://www.wddqw.com/doc/eef4d268260c844769eae009581b6bd97e19bc1c.html