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小学三年级英语课本电子版
小学英语必背的公式有:
1.allow sb to do sth允许某人去做某事(后接动词不定式)
例句:My father allowed me to go out for a walk after finishing my homework
2.asked sb (not) to do sth叫某人做事某事(叫某人不要去做某事)
例句:My father asked me to study hard
3.be asked to do sth被叫去做某事/被邀请去做某事
例句:I was asked to have a dinner with them yesterday
3. be afraid to do sth害怕做某事
例句:She is afraid to ask me questions
4. be afaid of doing sth害怕做某事
例句:I am afraid of going out at night
5. be afaid of sth害怕某物
例句:He is afraid of snakes
小学英语语法速记公式
1、现在进行时用法。主语在句首,am, is, are跟在后,现在分词跟着走,其他成分不可丢。表示动作正进行,句中now时间定。一般问句,把be提到句前去。
2、否定句式也简单,be后只把not添。
3、特殊疑问句用法。What用途广,要问“什么”它当先。(What’s this?)How开头来“问安”。(How are you?)。
4、Who问“谁”。(Who’s that man?)“谁的”Whose来承担。(Whose eraser is this?)。
5、询问“某地”用Where。(Where is her cat?)“哪一个”Which句首站。(Which one?)。
6、动词加-s或-es方法歌诀。
7、动词三单现在式,一般词尾加-s。
8、s, x, ch, sh在词尾,直接加上-es。词尾若是字母o,加上-es不用愁。
9、“辅音字母+y“来结尾,变y为i是正规。
10、-es后边紧跟随,study→studies看明白。
11、“be going to”的用法口诀
12、be going to,表打算,准备、计划将干。表可能,有必然,通过现象来推断。
英语各种动词的名词形式
to V做宾语。不定式有要做,未做和待做的意思。所以,前面的谓语动词经常是表达心理的动词。如want, plan, deside, agree, hope等。
I want to go to college. He plans to buy a new car. I hope to make friends with you.
V-ing做宾语,就那么几个常用的,记住它们,其他你基本就可以用不定式了。这类动词常见的有:like, enjoy, finish, practice, avoid, can't help, mind等。如:I enjoy reading. Nobody can avoid making mistakes. I often practice speaking English with foreigners.
有几个动词是两种形式都可以,但意思有区别:
首先是forget, regret, remember和stop.它们的用法是未做的用不定式,已经做过或做着的用V-ing.如:I forgot to tell him about the phone call. 我忘了把有人打电话的事告诉他。I remember seeing him somewhere before. 我记得在哪里见过他。
want和need是一组。主动表被动用V-ing,其他用不定式。如:You need to tell him the truth. Your hair needs cutting.
try to V,努力做;try V-ing,试验着做。I try to learn English well. He tried opening the door with a knife.
mean to V意图/本意要做; mean V-ing意味着,意指。如:I meant to help you. I didn't mean to hurt you. Success means working harder than anybody else.
learn, begin也是两者皆可。但强调延续用V-ing,不强调延续用不定式。如:It began raining 3 days ago. 这里强调已经下了三天。Suddenly it began to rain.这里只是讲下雨,不强调延续。
这样的动词用法成百上千,你不可能用公式解决的。方法原理掌握了,其他基本就不用多想了,跟着感觉走就可以了。
公式的英语单词怎么写
1、 Need,want,require(要求,需要),deserve(应得,值得),be worth值得),not bear(经不住) 后面接doing主动表被动.
The book is worth reading.这本书值得一读.
The old building requires repairing.这座古建筑需要修了.
These young seedlings will require/need looking after (=need to be looked after) carefully.这些幼苗将需要小心的照管.
Your hair wants/needs cutting (needs to be cut).你的头发该剪了.
2、不定式作定语,放在被修饰词后面,与前面被修饰的名词或代词有动宾关系,又在句子中与另一名词或代词有主谓关系,不定式要用主动表被动含义.
I have much work to do.我有许多要做的事情.(与work有动宾关系,与I有主谓关系)
Tom is looking for a room to live in.Tom在找一间住的房间.(与room有动宾关系,与Tom 有主谓关系)
He has a family to support.他要维持一个家庭.(与family有动宾关系,与he有主谓关系)
3、不定式修饰作表语和宾语补足语的形容词时,结构:主语+系动词+形容词 + 不定式; 动词+宾语+形容词+不定式.如果形容词是表示难易、利弊等含义,如 difficult,easy,comfortable(舒适的),convenient(便利的,方便的),hard,cheap,expensive,等,不定式用主动表被动.
The question is difficult to answer.这个问题很难回答.
The work is easy to do.这项工作很好做.
I found the car comfortable to ride in.我觉得这种车很好坐.
That makes poetry difficult to write.那就使得诗很难写.
4、在be to结构中的一些不定式:这种结构中的不定式通常应用主动表被动.下列动词用不定式的主动形式表示被动意义:
Who is to blame for starting the fire?
这场火灾应由谁负责?
You are to blame for the accident.你应为这事受动责备.
The house is to let.此房出租.
A lot remains to do.还剩下许多事情要做.
5、系动词没有被动形式,但有些系动词常表示被动意义.常见的有taste(吃起来),sound (听起来),prove(证明是),feel(摸上去感到),look(看起来),smell(闻起来)等,例如:
Your reason sounds reasonable.
你的理由听起来很合理.
Good medicine tastes bitter to the mouth.良药苦口.
6、一些与can’t(不能)或won’t(不会)连用的动词.常用的有:lock(锁住),shut(关上) ,open(打开),act(上演),write(写),cut(砍,切),wear(穿,戴)等,用作不及物动词时,用主动表被动.例如:
The door won’t open.这门打不开.
It can’t move.它不能动.
7、一些动词如sell(销售) ,wash(洗),clean(打扫),burn(燃烧),cook(煮)等与副词如well(好),easily(容易地),perfectly(十分地)等连用 ,描会事物的特性,用主动表被动,结构是主语+动词+加副词.例如:
英语动词的一般过去形式怎么变化
1、一般情况下,动词词尾加 -ed ,如:
work ---worked play---played wanted----wanted act----acted
2、以不发音的 -e 结尾动词,动词词尾加 -d,如:
live---lived move----moved taste---tasted hope---hoped
3、以辅音字母 + y结尾的动词,把-y变为-i 再加-ed,如:
study---studied copy---copied cry---cried carry---carried
4、以一个辅音字母结尾的重读闭音节动词,双写词尾辅音字母,再加 -ed,如:
stop ---stopped
5、不规则动词的过去式变化规律性不强,须多加记忆.
go – went make – made get – got buy - bought come - came fly-flew
不规则动词的过去式的构成
1.把动词原形中的i改为a,变成过去式.如:
begin—began,drink—drank,give—gave,ring—rang,sing—sang,sit—sat,swim—swam
2.把重读开音节中的i改为o,变成过去式.如:
drive—drove,ride—rode,write—wrote
3.改动词原形中的aw /ow为ew,变成过去式.如:
draw—drew,grow—grew,know—knew,throw—threw(动词show除外,show—showed)
4.动词原形中的e改为o,变成过去式.如:
get—got,forget—forgot
5.动词原形中的ee改为e,变成过去式.如:
feed—fed,meet—met
6.动词原形中的eep改为ept,变成过去式.如:
keep—kept,sleep—slept,sweep—swept
7.动词原形中的eak改为oke,变成过去式.如:
break—broke,speak—spoke
8.动词原形中的ell改为old,变成过去式.如:
sell—sold,tell—told
9.动词原形中的an改为oo,变成过去式.如:
stand—stood,understand—understood
10.以ought和aught结尾,且读音是〔 :t〕的过去式.如:
bring—brought,buy— bought,think—thought,catch—caught,teach—taught
11.以ould结尾且读音为〔ud〕的情态动词过去式.如:
can—could,shall—should,will—would
12.把动词原形中的o改为a,变成过去式.如:
come—came,become—became
13.在动词原形后加d或t变成过去式,并且发生音变.如:
hear〔hi 〕—heard〔h :d〕,say〔sei〕—said〔sed〕,mean〔mi:n〕—meant〔ment〕
14.动词的过去式与动词原形一样.如:
let—let,must—must,put—put,read—read〔red〕
15.不符合上述规律的动词过去式.如:
am,is—was,are—were,build—built,do—did,eat—ate,fall—fell,feel—felt,find—found,fly—flew,go—went,have /has— had,hold—held,leave—left,make—made,may—might,run—ran,see—saw,take—took
过去式“-ed”的发音规则
(1)动词词尾为“t,d”时,发/ id /音,
want →wanted (要)need →needed (需要)
(2)动词词尾为清辅音时,发/ t / 音.
help →helped (帮助)laugh →laughed (笑)look →looked (看)
kiss →kissed (吻)wash →washed (洗) watch →watched (注视)
(3)动词词尾为t,d以外之浊辅音或元音时,发/ d /音.
call →called (叫)stay→stayed (停留)cry→cried (哭)
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