八年级上册英语知识点
Unit 2.How often do you exercise?
一.、重点短语归纳：
1.go to the movies =go to the cinema去看电影 2.look after=take care of 照顾
3. healthy lifestyle 健康的生活方式 5.go skateboarding 去滑滑板
go shopping 去购物 go swimming 去游泳 go boating 去划船 go fishing 去钓鱼
6.keep healthy=stay healthy= keep in good health保持健康 keep +形容词，“表保持某种状态”
7.exercise= take/do exercise=do /play sports锻炼 take more exercise 多做运动
10.be the same as 与---相同 be different from 与-----不同 11. once a month一月一次 twice a week一周两次.
once or twice a week 一周一两次 three times a week一周三次 four times a week 一周四次
three or four times a week 一周三四次 12 make a difference to 对什么有影响
如：As teachers, you must believe that you can make a difference to the lives of your students.
身为教师，你们必须坚信你们能够影响学生的一生。
如：A false step will make a great difference to my future. 错走一步对我的前程来说会产生很大影响。 20.activity survey活动调查 21.do homework做家庭作业 22.do housework做家务事
23.eat less meat and more vegetables 少吃肉多吃蔬菜 24.junk food垃圾食物
25.be good for 对什么有益 be bad for对什么有害 27.want to do sth 想做某事
28.want sb to do sth想某人做某事
30.come home from school/ work 放学/下班回家 31.of course=certainly=sure当然,当然可以 32.get good grades取得好成绩 33.some advice 一些建议 advice 是不可数名词 a piece of advice 一则建议 give advice 提出建议
take one’s advice 采纳或听从某人的建议
34.help sb （to） do sth帮助某人做某事=help sb with sth 38.your favorite program你最喜欢的节目 39.Animal World 动物世界
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41.every day每天
45.all students 所有的学生 46.most students 大多数学生 47.some students 一些学生 48.no students 没有学生
49.the result of a survey 调查结果 51.improve your English 提高你的英语 52.drink milk 喝牛奶
53.pretty healthy 相当健康 pretty，adv. 相当，非常
=rather=very=quite 非常，相当
My eating habits are pretty good.我的饮食习惯相当好。 54. kind of = a little有点
I think I’m kind of unhealthy.我想我有点不健康。
55.on weekends在周末 on weekdays 在平日，在工作日，在学习日 56.ask sb. about sth.就某事询问某人
57.go online去上网 surf/use the Internet上网 58.the answer to the question问题的答案 59.the best way to do sth.做某事的最好方式
60.at least / at most twice a week一周至少/最多2次 61.such as 例如
62.less than少于 more than多于
The old man is more than eighty years old.这位老人八十多岁了。 63.swing dance摇摆舞
64.go to bed early早点睡觉 stay up (late) 熬夜 65.in one’s free time在某人的业余时间 66.help with housework帮忙做家务 67.old habits die hard 旧习难改
68.play tennis/ basketball/ volleyball打网球/篮球/排球 play soccer/ football 踢足球
69.have dance and piano lessons上舞蹈课和钢琴课 70.go shopping=do some shopping购物
71.spend time with sb.和某人一起度过时光 72.sometimes=at times有时 二、重点句子：
1.How often do you exercise? 你（你们）多久锻炼一次身体？ 解析：How often + 助动词do(does) + 主语 + do sth.? 疑问词how often是问频率(多久一次),一般与一般现在时连用，回答一般是用表示频率的副词，如：always,usually,often, sometimes, hardly ever, , never, every day, once a week , twice a month , three times a month , three or four times a month等。
Eg1)——How often do you go to the factory?
——Twice a week.你们多久到工厂去一次？每星期两次。 Eg2)——How often does he go shopping?
——He goes shopping once a month. （每月一次） 2.——“What do you usually do on weekends?”
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——“ I usually play soccer.”“周末你通常做什么？”“我通常踢足球。” 解析：第一个do为助动词, 而第二个do则是实义动词。 Eg1) I often go to the movies.（对划线部分提问） ？
3.—— What’s your favorite program?=What program do you like best? ——“It’s Animal World.”“你最喜欢什么节目？”“动物世界。” 4.As for homework , most students do homework every day . 解析：as for...意思是“至于；关于”，常用于句首作状语，其后跟名词、代词或动词的-ing形式（即动名词）。
As for the story，you'd better not believe it. 关于那故事，你最好不要相信。
had better (not) do sth最好（不）干某事 you’d =you had
As for the man, I know nothing about him. 至于那个人，我什么都不知道。 5. Mom wants me to get up at 6:00 and play ping-pong with her . 解析：want to do sth. 意思是“想要做某事”；
want sb. to do sth.意思是“想要某人做某事”。如：
Eg1)Do you want to go to the movies with me？你想和我一起去看电影吗？ Eg2)He wants me to help him with his English.他想让我帮助他学习英语。 注意：有很多动词后面用这种结构做动词的复合宾语，如： ask sb. to do sth. 叫某人做某事
tell sb. to do sth. 告诉某人去做某事 help sb. (to) do sth. 帮助某人做某事 6. She says it’s good for my health.
解析：be good for...表示“对??有益（有好处）”；
其反义为：be bad for...。（这里for 是介词，后跟名词、代词或动名词）如： Eg1)It's good for us to do more reading. 多读书对我们有好处。
Eg2)Reading in bed is bad for your eyes.在床上读书对你的眼睛有害。
10.I try to eat a lot of vegetables , usually ten to eleven times a week . 解析：try to do sth.表示“ 尽力/努力做某事 ”
try doing sth.表示“（用某一办法）试着去做某事”。 try one’s best to do sth 尽某人最大力量做某事
如: You’d better try doing the experiment in another way.你最好试试用另一种方法做这个试验。
We should try our best to learn English well. 我们应该尽最大力量学好英语。
11. My healthy lifestyle helps me get good grades. 解析：help sb.(to) do sth.帮助某人做某事
12. Good food and exercise help me to study better. 解析：这里better是well的比较级
13.Is her lifestyle the same as yours or different? 解析：be the same as ? / be different from ? 14. What sports do you play ? 你做什么运动？
15. A lot of vegetables help you to keep in good health .
解析：keep in good health = keep healthy = stay healthy 保持健康 17. That sounds interesting.
解析：这是“主语+系动词+表语”结构的简单句。
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sound（听起来），look（看起来），smell（闻起来），taste（尝起来），feel（觉得，摸起来），seem（好象）,grow（变得）,get（变得）等词在英语中可用作系动词，后跟形容词作表语。如：
Eg1)It tastes good. 这味道好。
Eg2)The music sounds very sweet. 这音乐听起来很入耳。
Eg3)The smoke grew heavier and heavier. 烟雾变得越来越浓了。
Eg3)Now the days get shorter and the nights get longer.现在白天变长了夜晚变短了。
18. I think I’m kind of unhealthy.我想我有点不健康。 解析：kind of = a little
a kind of 一种
19.Exercise such as playing basketball is fun.像打篮球这样的锻炼是有趣的。 such 可作形容词或代词，意为“如此，这样，那样”
He is such a clever boy.他是一个如此聪明的男孩。
such 作形容词即可修饰可数名词也可修饰不可数名词，结构为：such a /an +形容词+单数可数名词；such +形容词+复数名词或不可数名词。
例如：这些是如此有趣的故事。These are such interesting stories.
such as意为“ 例如”“像----这样”，后跟名词或名词短语。作“例如”讲时指列举同类人或事物中的几个例子（至少列举两个）
He knows five different languages,such as Chinese and Japanese. 20.although=though虽然,尽管 ，不能与but连用，即一句话中用了although/though就不能再用 but. 如：Although he is old, he is quite healthy.(He is old, but he is quite healthy.) 虽然他年老了但是他很健康。
解析：句子中，有although或though就不可再用but，
与之类似的情况：有because就不能再用so. 今天早晨因为下大雨所以我上班迟到了。
I was late for work this morning because it rained hard/heavily. This morning it rained hard/heavily,so I was late for work.
21.She says it’s good for my health.她说它对我的健康有好处。 解析：be good for对?有益；其反义词组：be bad for对?有害
如：Eating vegetables is good for your health.吃蔬菜对你的健康有益。 辨析：be good for ,be good at ,be good with，be good to be good for“对?有益”； be good at“擅长于”；
be good with“和?相处的好”=get on well with sb 如：I’m good at playing football.
I’m good with my classmates.我和我的同学们相处得很好。 be good to sb =be friendly to sb 对某人好/和善
如：He is good to his classmates.他对他的同学们很好。 22.How come?怎么回事？
解析：表示某件事很奇怪，有点想不通。可单独使用，也可引导一个问句，相当于疑问词why.但how come开头的特殊疑问句使用的仍是陈述语序。 如：How come you didn’t tell me about it?
=Why didn’t you tell me about it?你怎么不早点告诉我这件事
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