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小学作文重点讲解(汇编四篇)

地震毁了我们的家园,但却推不垮我们的心灵家园!小编收集防震救灾的作文,欢迎阅读。

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篇1:向重点冲刺小学作文450字_小学生作文

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转眼间,五年快过去了,而我的学习还在班里前十名徘徊,可是全年级七个班,考上重点相当有难度。

为此我叫妈妈给我买了许多资料、练习,有同步的,有单元的,有期中期末的……加起来一共有10本左右。说说每天的计划吧:上学。上午7点田径队训练。上课。每上完一节课,一下课就拿出自己的笔记本,疯狂地做笔记——老师不准我们上课做笔记,因为一边听,一边记,没有记完整,还把后面的忘了。有时候还有作业,我总是从百忙之中抽出时间记笔记。中午吃完饭,赶紧回教室,做同步练习……下午第三节课,继续田径队训练。放学。回到家,以迅雷不及掩耳盗铃的速度把作业全部干掉,拿出资料复习半小时,然后把练习会的都做掉……就这样,到8点了,终于能休息了。我可以活动一下了——看看报纸杂志,做些小玩意儿。到睡觉的时候了,我钻进被窝,拿起小说津津有味地看起来……看到9点,在母亲的再三催促下,我终于熄灯入睡了。

有时候,我面对着学习也会恼怒,但是,我又想:“考重点叫要这样,不能叫苦,不叫累,坚持不懈,才能考上重点。”所以,为了重点,我豁出去了。我真想大喊:“向终点冲刺!!!”

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篇2:小学生作文知识要点讲解

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一、什么是作文?

为什么要写作文?文章有什么作用?作文是我们通常说得写文章,作文就是写文章,也就是用文字的形式把自己所看到的、听到的、想到的记录下来。文章可以长久地保存,可以广泛地流传。文章不会随着时间的流逝而消失。虽然近代以来电报、电话、电视、电影、网络都可以保留和交流信息,但文字保留仍然是一种主要的传递人类文明成果的主要形式之一。

二、文章的构成。

一篇文章是一个整体,好比一个人由头、手、脚、躯干组成。那么文章呢?文章是由字、词、句、标点、段、篇组成的。大家知道,身体任何一个部分出现毛病,人体就不健康,同样的,一篇文章中字、词、句、标点、段、篇任何一个部分出现毛病,都不是好文章。所以写好文章要正确地运用每一个字、词、句、标点,并分好段,组成篇才是一篇好文章。

三、小学阶段文章的分类及各类文章的写作要求。

通常我们小学阶段小学生所写的文章以记述文为主及简单的应用文。小学生作文的基本文体通常分成六大类:写人、写事、状物、想象、应用文。

1、写人:写人要写“真实”,讲“真话”,育“真人”。可以自由选材与立意,写人要写出人物的个性与特点,写得人物要神气活现。

2、写事:写事要交代清楚时间、地点、人物、事件经过与结果。写清楚社会环境与自然环境,按事情发生过程写清楚。

3、写景:写景文章要写清对象的主要特征、形状、颜色、声音、动态、静态等特征。写景一定要表达感情,要注意描写对象顺序、层次、重点、景物间关系。

4、状物:状物分为动物、植物、静物三类。状物文章要注意观察,观察要细致,状物文章必须按一定顺序、层次写清楚。

5、想象:想象作文关键就在于要充分发挥想象力,可以根据事物之间的联系,从这件事物想象到另一件事物,从事物某一点想到事物其他方面,联想事物的过去与未来。

6、应用文:应用文与生活、社会联系紧密,格式、行为习惯更有规定。格式包括:书写要求、行款式样、结构、习惯用语、称谓和签署、简明得体、规范。同时要注意环境、时间、地点、场合、对象及表达方式。

四、小学生作文文字量问题。

小学作文通常要求写一定篇幅,要求写一定字数,其实是要求学生的作文尽量写长,写长了才会多想,多想了才能写长,命题者限字数是根据学生的水平,促使学生多想,把文章写成一定长度。我认为文章的长短实际要由感而发,有话则长,无话则短,从文字使用量来说,要做到“惜墨如金”与“泼墨如水”相结合,“惜墨如金”就是要文笔精练,“泼墨如水”就是要写具体与形象。

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篇3:小学生英语个重点句型

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导语:英语写作中,完美的固定句型必不可少,可以给你的作文增添不少色彩。下面是yjbys作文网小编为您收集整理的句型,希望对您有所帮助。

1。 allow sb to do sth 允许某人去做某事(后接动词不定式)

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)

My father asked me to study hard。

He asked me not to swim alone。

be asked to do sth 被叫去做某事/被邀请去做某事

I was asked to have a dinner with them yesterday。

3。 be afraid to do sth 害怕做某事

She is afraid to ask me questions。

4。 be afaid of doing sth 害怕做某事

I am afraid of going out at night。

5。 be afaid of sth 害怕某物

He is afraid of snakes。

6。 be amazed to do sth 对做某事感到惊讶

He was amazed to meet the girl there。

be amazed at sth 对某事感到惊讶

they were amazed at the news。

7。 be busy doing/with sth 忙于做某事(常考)

I was busy washing my car at that time。 那时候我正忙于清洗我的车子。

I am busy with my work。

8。 becoming/going/leaving/fiying/moving/dying(某些位移动词用进行时态时表将来)

the bus is coming/the dog is dying。

9。 be excited to do sth 对做……感到兴奋

Jacky was excited to travel there by plane。

be excited at sth

Lily was excited at his words。

be excited about doing sth

he was excited about passing the exam without going overing books。

10。 be frightened to do sth 害怕去做某事

Sam is frightened to ride a horse。

11。 be glad/happy to do sth 高兴去做某事

She is happy to clean theblackboard with me。

be pleased to do sth高兴做某事

She was pleased to helpthe old man yesterday。

be pleased with sth 对某事感到高兴/满意

The teacher was pleasedwith my answer。

12.be interested in sth/doing sth 对某事感兴趣/对做某事感兴趣

She is interested inswimming in the river。

My btother is interestedin Chinese。

13。 be/get ready for/to do sth

be ready for 为某事做好了准备

We are ready for the exam。

Be ready to do sth 为做某事做好了准备

We are ready to have a birthday party for her。

get ready for sth为某事在做准备

We are getting ready for the exam。

14。 be surprised to do sth 对做某事感到惊奇

be surprised at sth 对某事感到惊奇

This is nothing to be surprised at。

I‘d be surprised to see him on such an occasion。

15。 be worth doing sth 值得做某事(worth 后接动词-ing形式,常考)

It was too remote to be worth thinking about。

16。 开始去做某事begin to do sth begin/start to do/doing sth

When do children begin to go to school?

17。 can/be able to afford (to buy) sth 有能力负担(购买)……

At this rate we won‘t be able to afford a holiday。

18。 can/may/must do sth could/would/should/might do sth

We may come at another time。

19。 can‘t wait todo sth 迫不急待地去做某事

I can’t wait to hear the news。

20。 decide to do sth 决定去做某事

make up one‘s mind to do sth 下决心去做某事(常考)

make a decision to do sth 对做某事作出决定

What do they decide to do?

I have made up my mind to go with him

21。 deserve to do sth 值得/应该做……

We must admit that she did deserve to win。

22。 encourage sb to do sth 鼓励某人去做某事

Encourage them to do some other helpful recreations。

23。 enjoy doing sth 喜欢去做某事

I enjoy reading the story book

24。 expect (sb) to do sth 期望去做某事

Don‘t expect him to help you。

25。 fail to do sth 做某事失败

succeed doing sth 成功做了某事

If you don‘ t work, you willfail to pass the exam。

26。 finish doing sth 做完某事(后接动词-ing形式)(常考)

After finish doing your homework, you can have a rest。

27。 follow sb to do sth 跟随某人去做某事

Follow me to read the new words。

28。 get sb to do sth / make sb do sth/ let sb do st 让某人做某事(后接动词原形)

Her jokes made us laugh。

29。 get/have a chance to do sth 得到一个做某事的机会

I‘m very happy to have a chance to visit your school。

30。 give/pass/show/lend/sell sb sth/sth to sb

buy/get/bring sb sth/sth for sb

Please give me a piece of paper。

I bought him a drink in return for his help。

31。 go on to do sth /go on doing sth 继续做事(常考)

Go on doing the exercise after a short rest。

32。 hate to do/doing sth 讨厌/不喜欢做某事

Ihate to tell the news to you。

33。 have fun doing sth 做某事很有趣

Have fun getting to know each other。

34。 have problems doing sth 做某事遇到困难

Many people have problems getting to sleep at night。

35。 have sb do sth/have sth done 让某人做某事

This is the best work you have ever done。

36。 hear sb do sth 听到某人做某事(后接动词原形,常考)

hear sb doing sth 听到某人正在做某事(常见)

I heard someone laughing。

37。 help to do sth 帮忙做某事

help sb (to) do sth 帮助某人做某事

I‘ll help you clean the room。

38。 hope/wish to do sth 希望做某事

wish sb to do sth 希望某人做某事

I wish to take this opportunity to thank you all。

39。 It seems that 这像是……(后接从句)

seem to do sth

seem +adj

It‘seems that you are lying。

Does that seem to make sense?

40。 It‘s + adj+(for sb) to do sth。

It‘s+adj +(of sb) to do sth

It‘s glad for him to hear the news。

41。 It takes sb sometime/money to do sth 。 花费某人多长时间做某事(常考)

It takes me an hour to walk there and back。

42。 pay …for… cost spend…on…。。 it take …to do sth 花费

He paid for it out of his own pocket。

43。 It‘s best for sb to do sth。 对某人来说做某事是最好的

It‘s best for you to do more exercise。

had better do sth 最好做某事(注意had没有时态和人称的变化,better后接动词原形)

You had better go to the school。

44.It‘s time for sb to do sth 是某人做某事的时候了

It‘s time for us to have dinner。

45.keep (on)doing sth 坚持做某事(常考)

John always kept (on) asking questions。

keep sb doing sth 让某人做某事(常考)

Don‘t keep me waiting。

keep sbfrom doing sth 阻止某人做某事(常考)

He keeps her from cutting the tree。

keep sb/sth +adj 使某人保持……的状态

Washingyour hands keeps you healthy。

46.learn to do sth 学做某事Ilearn to play football。

learn sth from sb 向某人学习

I learn the spirit from him

47.like to do/doing sth 喜欢做某事like sb to do sth 喜欢某人做某事

She likes swimming。/She likes to swim this afternoon。

48.need to do sth/ need doing sth/need to be done 需要做某事

The garden needs to be watered。 / The garden needs watering。

49。 prefer to do sth rather than do sth 宁愿……而不愿……(常考)

I would prefer to spend the weekend at home rather than drive out。

prefer doing sth to doing sth 喜欢做……胜过做……

I prefer reading books to going shopping。 比起购物来,我更爱读书。

preferto do sth 喜欢(爱)做某事

50。 refuse to do sth 拒绝做……

I refuse to answer that question。

51。 remember/forget to do sth 记得/忘记做某事(没有发生)

Please do remember to post a letter forme。务必记得帮我寄信。

remember/forget doing sth 记得/忘记做过某事

I remember telling you the news before。我记得曾经告诉过你这个消息。

52。 see sb do sth 看见某人做某事(结果)

see sb doing sth 看见某人正在做某事(正在进行中)

be seen to do sth 做某事被看见

I saw them play football last weekend。

I saw her cleaning the classroom。

I saw him get on the bus。= He was seen to get on the bus。

53。 something to eat/drink 一些吃/喝的东西(词不定式放在something等后修饰这些词)

I need something to eat。 我要一些吃的东西。

54。 spend some time (in)doing sth /on sth 花费时间做某事(注意动词要用ing形式)(常考)

I spent 2 hours on homework。= I spent 2 hours in doing homework。

spend some money on sth/doing sth 买……花了多少钱

I ofen spend some money on the book。 I ofen spend some money buying the book。

55。 Sth is hard/difficult/easy to do 。 做好某事很难/容易

The question is easy to answer。

56。 stop to do sth停下来去某事(两件事)(常考)

stop doing sth 停止做某事(一件事)(常考)

stop sb (from) doing sth 阻止某人做某事(常考)

The two girls stopped to talk to me when they saw me。

The two girls stopped talking when they saw me。

I tried to stop my father from smoking,but failed。

57。 take turns to do sth 轮流做……

They take turns to do the cleaning。

58。 tell sb (not)to do sth 叫某人去(不要)做某事

He tell me not to swim in that lake。

59。 There is no need (for sb) to do sth 对某人来说没必要做某事

There is no need for you to worry。

60。 There is notime (for sb ) to do sth

have no time to do sth 没时间做某事

There is no time to think 。I have no time to do morning exercises。

61。 too…(for sb) to …… so… that… not… enough to do …太……以致不能

The boy is too young to go to school。

62。 try/do one‘s best to do sth 尽力去做某事

try to do sth 试着(图)做某事

We must try our best to do the job。

63。 used to do sth 过去常做某事

I used to live in the country。

used to be + adj/a +n 曾经是。。。

Mr wang used to be a teacher worker。

64。 would like to do sth=want to do sth= feel like doing sth 想要做……

want/would like sb to do sth 想某人做……

I don‘t feel like walking very much today。

I would like you to go away。

65。 warn sb (not) to do sth 警告某人做某事(或不要做某事)

His mother warned him not to go out in the evening。

66。 Why don‘t you do sth ?= Why not do sth ? 为什么不……(表建议的句型,注意用动词原形)

Why not have a rest?

表示建议的句型还有:

Shall we……?

What /How about……?(如果是动词,要用ing形式)

How about going fishing?

67。 Would you like (sb) to do sth ?Yes, I‘d love to 。

Would you like to join us?

Would you like me to buy you some food?

68。 Would you mind doing sth ? 你介意做某事吗?

回答:不介意(No+……)

Never mind/Not at all/Of course not/Certainly not 。 (从不介意/一点也不介意/当然不会了)

回答:介意(Yes+……)

I‘m sorry but I do。/Sorry, you’d better not。/ I‘m afraid you can’t。

-Would you mind my opening the door?

- No,of course not。

69。 Would you please (not) do sth 你可不可以做(不做)……?

Would you please open the door? / Would you please not close the windows?

70。常用固定短语

finish doing sth 完成某事

She finished cleaning the room。

practise doing sth 练习做某事

You‘d better practising reading and speaking English every day。

be good at doing sth 擅长做某事

I am good at playing basketball。

go on doing sth 继续做某事,指前后做的是同一件事。

The students went on talking and laughing all the way。

Go on doing the other exercise after you have finished this one。

be busy doing sth 忙于做某事

I am busy in cleaning my room。

see/hear/watch sb doing sth 听/看/观察到某人正在做某事

I hear him singing。

be afraid of doing sth 担心(害怕)会发生某事

My little sister is afraid of staying at home alone。

be interested in doing sth 对做某事的兴趣。

I‘m interested in playing games。

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篇4:小学数学《数的改写》知识要点讲解

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1、准确数:在实际生活中,为了计数的简便,可以把一个较大的数改写成以万或亿为单位的数。改写后的数是原数的准确数。例如把1254300000改写成以万做单位的数是125430万;改写成以亿做单位的数12.543亿。

2、近似数:根据实际需要,我们还可以把一个较大的数,省略某一位后面的尾数,用一个近似数来表示。例如:1302490015省略亿后面的尾数是13亿。

3、四舍五入法:要省略的尾数的最高位上的数是4或者比4小,就把尾数去掉;如果尾数的最高位上的数是5或者比5大,就把尾数舍去,并向它的前一位进1。例如:省略345900万后面的尾数约是35万。省略4725097420亿后面的尾数约是47亿。

4、大小比较

(1)比较整数大小:比较整数的大小,位数多的那个数就大,如果位数相同,就看最高位,最高位上的数大,那个数就大;最高位上的数相同,就看下一位,哪一位上的数大那个数就大。

(2)比较小数的大小:先看它们的整数部分,,整数部分大的那个数就大;整数部分相同的,十分位上的数大的那个数就大;十分位上的数也相同的,百分位上的数大的那个数就大……

(3)比较分数的大小:分母相同的分数,分子大的分数比较大;分子相同的数,分母小的分数大。分数的分母和分子都不相同的,先通分,再比较两个数的大小。

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