m1,m2分别代表什么?
m1,m2分别代表什么?
m1代表参数一,m2代表参数二。
在数学中经常会使用一些字母加数字来代指某个变量或者常量,因此,m1和m2就是代表两个参数
初一英语必考知识要点归纳
很多初一的学生不知道怎么备考英语,其实除了复习课本知识,考前复习一些必考的知识点对考试有很大的帮助。下面是我为大家整理的关于初一英语必考知识要点归纳,希望对您有所帮助。欢迎大家阅读参考学习!
初一英语必考知识
一、助动词(do, does )的用法
只有实意动词作谓语时才涉及使用助动词。以like为例:
1、当 句子 为肯定句时不涉及使历者用助动词,只涉及“主谓一致”原则。
eg : I like English a lot.
Michael likes Chinese food very much.
2、当句子为否定句时,要根据主语的人称来决定使用相应的助动词:当主语为“三单”时,要使用does;当主语为“非三单”时,用助动词原形do。例如把下列句子变否定句:
eg : Kangkang likes math.----Kangkang doesn't like math.
They like sports.------They don't like sports.
3、当句子变疑问句时,同样要根据句子的主语来决定在句首使用Do或Does.例如下列句子变问句:
eg : Michael likes Chinese Food.----Does Michael like Chinese food?
Yes, he does./ No, he doesn't.
Jane and Helen like music.----Do Jand and Helen like music? Yes, they do./ No, they don't.
二、like一词的用法
like用作及物动词,译为“喜欢”。
1、后接名词或代词,表示喜欢某人或某物。
eg :I like the baby very much. 我非常喜欢这个小孩。
2、后接动名词(v. -ing),表示“喜欢做某事”,着重于习惯、 爱好 。
eg :Tom likes playing football. 汤姆喜欢踢 足球 。
3、后接动词不定式(to do ),表示“偶尔地喜欢做某事”,着重于某空唯次具体的行为。
eg :I like reading, but I like to watch TV this evening. 我喜欢读书,但我今晚想看电视。
初一英语知识重点
1) 问候语 :
Good morning/ afternoon/ evening.
How are you?---Just OK, thank you. How are you?---Not bad, thanks.
Hi! Hello! How do you do?
2)道别用语:
Nice/ Glad to meet/ see you.(meet用于初次见面,see用于熟人间)
Nice to meet/ see you, too.
斗烂培Goodbye. Byebye. Bye. See you (later/ tomorrow/ next time)! So long! Good night!
3)介绍人或者物的句型:This is...
4)Excuse me.与I'm sorry.的区别:
Excuse me.是要引起对方的注意,而I'm sorry.则是向对方道歉。
5)词组be from = come from
6)当问句中问到this/ that时,回答要用it;问到these/ those时,要用they来回答。 例如: What's this in English?----It's an eraser.
What are those?----They are books.
7)对Thanks.的回答:That's OK./ You're welcome./ My pleasur.
8)look the same = have the same looks
give sth. to sb. = give sb. sth.
be like = look like
in the tree/ on the tree (树上结的、长出来的用on,否则用in)
in red(穿着红色的衣服)
初一英语知识要点
1)speak的用法
speak与say不同:speak表示“说”的动作,不表示“说”的内容;say则表示“说”的内容。
speak后面除了能接“语言”外,不能直接接东西,后面加了to则表示“对......说”。
help sb. with sth.(帮助某人做/补习......)
want to do sth.(想要做某事)
would like to do sth.
not...at all(一点都不);Not at all.(没关系/别介意)
like...a lot = like...very much
2)some和any的区别:
口诀:some用于肯定句,否定、疑问变any。例如:
I have some money.
I don't have any money.
Do you have any money?
3)have a seat = take a seat(请随便坐)
4)祈使句(表示命令或请求的句子)
祈使句一般都省略了主语You,所以其否定句直接用Don't开头。例如:
Don't go there!
5)问职业:
What does sb. do? What is sb.?
What's sb.'s job?
6)work与job的区别:
work是未必有报酬的“工作”,例如homework, housework;而job则一定是有报酬的“工作”。
7)on指在物体的表面,不论这个面是否水平的,例如:
on the desk/ wall/ farm/ playground
8)in hospital(住院);in the hospital(在医院里)
look after(照料/照顾/照看)
help oneself(请自便/随便吃)
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