八年级上|仁爱版英语八年级上册课文听力Unit 2 Topic 2（附知识梳理）,预习随身听！
Topic 2
一、重点词组:
look tired 看起来很累
watch a soccergame on TV 在电视上观看一场足球赛
stay up 熬夜
keep longfingernails 留长指甲
wash hands beforemeals 饭前洗手
play sports rightafter meals 饭后适当运动
take a freshbreath 呼吸新鲜空气
be necessary for… 对于…是必不可少的
keep youactive 使你保持精力旺盛
in thedaytime 在白天
throw litterabout 乱扔垃圾
get enoughsleep 得到足够的睡眠
exercise on anempty stomach 空腹锻炼
= without eatinganything
need to dosth 需要做某事
get into 进入
become sick 生病
fight germs 抗击病菌
keep the air cleanand fresh 保持空气清新
eat bad food 吃变质食物
sweep thefloors 打扫地板
as we know 众所周知
have the rightkinds of food 吃正确种类的（健康的）食品
choose the wrongfood 选择错误的（不健康的）食品
in differentways 用不同的方法
make us sick 使我们生病
二、重点句型
I see. Staying uplate is bad for your health. 我明白了. 熬夜有害你的健康.
(动名词短语做主语)
2. How did Wang Jun get a headache? 王俊怎样患上头痛的？
Is going to bedearly good or bad for your health? It’s good.
早点睡觉对你的健康有益还是有害? 有益. (选择问句要根据事实回答)
Walking is goodexercise and it is necessary for good health.散步是很好的锻炼,是身体健康必不可少.
It will keep youactive in the daytime. 它(早睡早起)将使你在白天保持旺盛的精力.
You must not throwlitter about. = Don’t throw litter about. 不要乱扔垃圾.
We may have morethan one headache each month. 每月我们可能会不止一次头疼.
You may get aheadache when you can’t get enough sleep.当你睡眠不足时,可能会头疼.
What does it meanwhen you have a headache? 头痛对你来说意味着什么?
The boy becomessick. 那个男孩生病了.
As we know, foodgives us enery. 众所周知,食物给我们提供能量.
If we eat toolittle or too much food, or if we choose the wrong food, it can make us sick.
如果我们吃得太少或太多, 或者食物的选择不当会生病的.
三. 重点语言点
1. be good for… 对……有益
be bad for… 对……有害
如: Swimming is good for health. 游泳对健康有益.
Reading in strong sunlight is bad for theeyes. 在强烈的阳光下看书对眼睛有害.
disease 通常指具体的病, 表 “特定的疾病、病名”
illness 通常指生病的状态或表抽象的疾病如： Germs can cause diseases. 细菌会引发疾病。 SARS is a serious disease. 非典是一种严重的疾病。 Don’t worry about his illness. 别担心他的病。
exercise 表“锻炼/运动”时, 为不可数名词;
表“练习”或有定语修饰时, 为可数名词.
如: He often takes/does exercise in themorning. 他经常上午锻炼.
Please do theexercises at once.请马上做这些练习.He does morning exercises every day. 他每天做早操Walking is good exercise. 散步是很好的锻炼.
enough adj. “足够的”
修饰名词时, 既可放在名词之前, 也可放在名词之后.(但通常放在名词之前)
如: I have enough time/ time enough to finishthis work. 我有足够的时间完成这项工作.
There is enoughfood in the fridge. 冰箱里有足够的食物.
adv. “足够地” 修饰形容词或副词时, 均放在所修饰词的后面.
如: Heis tall enough to reach the apple. 他足够高,能够得着苹果.
He speaks clearlyenough. 他讲得足够清楚.
need “需要, 必需”
1 作实义动词: need sth. 需要某物 needto do sth. 需要做某事
如: I need some help. 我需要一些帮助.
You need to see adoctor. 你需要去看医生.
He needs to take abus. 他需要去搭车.
2 作情态动词: need + 动词原形
如: If she wants anything, she only need ask.她想要什么东西, 只要开口就行了.
You needn’t finishthis work today. 你不必今天完成这项工作.
6．too much + 不可数名词 表“太多的。。。”
much too + 形容词 表“太。。。”，much 起加强语气作用
如：Don’t eat too much meat. 不要吃太多的肉。
He is much toofat. 他实在太胖了。
四.重点语法
情态动词:
①must “必须, 一定”如: We muststudy hard. 我们必须努力学习.
mustn’t “不可以” 如: Youmustn’t walk on the lawn. 你不可以在草坪上行走.
②should “应该” 如: Weshould finish it on time. 我们应该按时完成它.
shouldn’t “不该” 如: Youshouldn’t go to school late. 你不该上学迟到.
③had better “最好” 如：You hadbetter go to bed early.你最好早睡。
had better not “最好不” 如：You had better not go to bed late.
你最好不要迟睡。
④may “可以”如: May I come in? 我可以进来吗?“可能” 如: You may get a headache when you work too hard.
当你工作太努力时,你可能会头疼.
情态动词有具体的词义，但也同助动词一样，需要与其他词语一起构成句子的谓语，另外情态动词没有人称和数的变化，情态动词后必须跟动词原形。
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