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    一次函数知识,数学一次函数知识,高中数学一次函数知识

    高中数学一次函数知识点[ 复习总结 ]

    复习总结 时间:2022-07-29 04:38:00 热度:1℃

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    简介:

    一般地,形如y=kx+b(k,b是常数,k≠0)的函数叫做一次函数。其中x是自变量,y是因变量,k为一次项系数,y是x的函数。下面小编给大家分享一些高中数学一次函数知识,希望能够帮助大家,欢迎阅读!高中数学一次函数知识1一、定义与定义式:自

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    我们都知道学习英语最重要的就是时态的语法学习。如果语法学得特别好,对英语写作非常有帮助,而且还可以考高分。下面小编给大家分享一些高一下册英语知识点,希望能够帮助大家,欢迎阅读!

    高一下册英语知识1

    现在进行时

    1.表示现在 (说话瞬间)正在进行或发生的动作。

    [例句] He is reading a newspaper now.

    2.表示当前一段时间内的活动或现阶段正在进行的动作 (说话时动作不一定正在进行)。

    [例句] What are you doing these days?

    3.表示说话人现在对主语的行为表示赞叹或厌恶等,常与always, constantly, continually等副词连用。

    [例句] He is always thinking of others.

    4.表示在最近按计划或安排要进行的动作。常限于go, come, leave, start, arrive等表“移动”、“方向”的词。

    [例句] He is coming to see me next week.

    高一下册英语知识2

    高一英语时态语法知识点:过去进行时

    1.表示过去某时正在进行的动作。

    [例句] He was sleeping when Mary came to see him.

    2.动词go, come, leave, arrive, start等的过去进行时常表过去将来时。

    [例句] She said she was going to Beijing the day after tomorrow.

    高一英语时态语法知识点:一般现在时

    1.表示现在习惯或经常反复发生的动作或存在的状态,常与usually, always, sometimes, often, every day / week / month / year等时间状语连用。

    [例句] He often does his homework in his study.

    2.表示主语现在的特征、性格和状态。

    [例句] The dictionary belongs to me.

    3.表示客观规律或科学真理、格言,以及其他不受时间限制的客观存在。

    [例句] The moon goes around the sun.

    4.在有连词if, unless, before, as soon as, when, once, however等引导的时间、条件和让步状语从句中,用一般现在时表将来。

    [例句] If you work hard, you won’t fail in the exam.

    高一下册英语知识3

    高一英语时态语法知识点:一般过去时

    1.表示过去某一时间发生的动作或存在的状态。

    [例句] She went to the zoo yesterday.

    2.在时间、条件状语从句中代替过去将来时。

    [例句] He said when she came he would tell her.

    高一英语时态语法知识点:一般将来时

    1.表示将来发生的动作或存在的状态,常与表示将来的时间状语连用。

    [例句] I don’t know what will happen in the future.

    2.常用来表示将来时的结构包括:

    (1) shall / will +动词原形:(单纯)表将来,一般不用于条件句。

    (2) be going to +动词原形:(计划)打算做……。

    (3) be about to +动词原形:即将或正要去做某事,通常不与时间状语连用,但可与when引导的从句连用。

    (4) be to +动词原形:预定要做……。

    (5) be doing表示按计划、安排即将发生的动作,常与go, start, set out, leave, reach, arrive, return, come, move等表位移的动词连用。

    高一下册英语知识4

    高一英语时态语法知识点:现在完成时

    1.表示过去发生或已经完成的某一动作对现在造成的影响或结果。

    [例句] —Have you had your supper yet? —Yes, I have just had it.

    2.常与介词for, during, in, within, over等引导的时间状语连用,表示过去的某一行为一直延续到现在。

    [例句] I haven’t seen my English teacher for a long time.

    3.表示反复或习惯性的动作,常与several times, once, twice, frequently等频度副词连用。

    [例句] I have been to the USA several times.

    4.表示从过去到现在没有发生过的动作。

    [例句] I haven’t swept the floor for a week.

    5.用在时间、条件状语从句中,表示从句动作先于主句动作完成。

    [例句] I’ll tell him after you have left.

    6.在“最高级+名词”或在“这是第几次…”之后跟定语从句,从句用现在完成时。

    [例句] ①This is the third time I have been there.

    ②This is the best tea I have ever drunk.

    高一英语时态语法知识点:过去完成时

    1.表示在过去某一时刻以前已经开始并一直延续到这一时刻、或是在此刻前已经完成的动作。

    [例句] By the end of last term, we had learned 1,000 English words.

    2.有些动词 (如: hope, think, expect, mean, intend, suppose, want等)的过去完成时可表示过去未曾实现的希望、打算或意图。

    [例句] I had hoped to see more of Beijing.

    高一下册英语知识5

    ◆动词时态应注意的几点

    1.瞬间性动词的一般现在时和现在进行时常用来表示将来的动作。例句:

    ①The film begins in a minute.

    ②My uncle is leaving tomorrow morning.

    2.在时间、条件、让步状语从句中,常用一般现在时代替一般将来时。例句:

    ①Every time I listen to that song, I’ll think of my old friend.

    ②If you do that, I shall be very pleased.

    ③They’ll stand by you even if you don’t succeed.

    3.一般过去时和现在完成时的区别:一般过去时和现在完成时都表示过去所发生的动作,但现在完成时强调这一动作与现在的关系,如对现在产生的影响、结果等,所以它不能和表示过去的时间状语连用;一般过去时只表示过去的事实,不表示和现在的关系,因而它可以和表示过去的时间状语连用。如:

    —Have you finished your work?

    —Yes, I have.

    —When did you finish it?

    —I finished it last summer.

    ◆直接引语与间接引语转换时应注意的几个问题:

    1.人称的变化

    2.时态的变化

    3.时间状语的变化

    4.地点状语的变化

    例句:

    ①Xiao Yi said, “I want to go to the park this afternoon.”

    →Xiao Yi said (that) he wanted to go to the park that afternoon.

    ②Bob said, “We’ll have a meeting here tomorrow morning.”

    →Bob said (that) they would have a meeting there the next morning.

    ◆定语从句中关系代词只能用that和不能用that的几种情况:

    只能用that的情况

    1. 先行词是不定代词。

    例句:Please tell me everything that happened to you.

    2.先行词被形容词最高级、序数词或only, last, same, very等修饰。

    例句: ①This is the most interesting movie that I have ever seen.

    ②This is the only book that I read during the summer holiday.

    3.先行词既包括人又包括物。例句:She talked about the writer and his works that interested her.

    不能用that的情况

    1.非限制性定语从句中。

    例句:He said he could speak three foreign languages, which is not true.

    2. 先行词本身是that。

    例句:I have that which you gave me.

    3. “介词+关系代词”结构。

    例句:The person to whom I talked just now is Tom.

    ◆现在完成进行时与现在完成时进行的比较:

    1.强调动作还未结束时,多用现在完成进行时;强调动作的结果时,多用现在完成时。例句:

    ①I have been painting the paining. (强调“一直在画”这个动作)

    ②I have painted the painting. (强调“画完了”这个结果)

    2.有些动词不能用在现在完成进行时中,但可用在现在完成时中。如:have, love, see等。例句:

    ①She has had a cold for a week.

    ②They have loved each other for three years.

    ③I have seen this movie.

    -ing形式:

    1. having done

    having done是非谓语动词中-ing形式的完成式,而doing则是其一般式,它们都与句中主语构成逻辑上的主谓关系,只是doing与句中谓语动词同时发生或基本上同时发生;having done则表示动作或状态发生在句中谓语动词之前。

    [例句]

    ①Hearing the news, they got excited. (hear和get excited这两个动作几乎同时发生)

    ②Having arrived at the top of mountain, they took a rest. (arrive发生在take a rest之前)


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