文档介绍：Unit 1 often do you exercise? Once a day. 2. Exercise helps me to study better. must eat less meat.  核心知识 ： always, usually, often, sometimes, hardly ever, never. 2. once a week 一周一次，twice a year 一年两次 three times a week 一周三次 four times a month 一个月四次 3. all, most , some , no , both, either, neither ※4. be good for sth./ doing sth. 对什么有益 be bad for sth. /doing sth. 对什么有害 be good at意为“擅长……”，后接名词、代词或ving形式。 be good with意为“灵巧的；与……相处得好”； be good to意为“对……友好。 5. want to do sth. 想要做某事 want sb. to do sth. 要某人做某事
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※ to do sth. 尽量做某事，尽力做某事 ，不包含是否成功的意思 try doing sth. 表示“ （用某一办法）试着去做某事”。
7. look after = take care of 照顾
8. keep in good health = keep healthy = stay healthy =be healthy 保持健康
※ 9. although == though“虽然，尽管” 引导的从句不能与but, however连用，但可与yet, still连用 。
※ 10. be the same as 与什么相同 be different from 不同
different adj. differences n. 可数
11. most of the students=most students
12. get good grades取得好成绩
※ 13. some advice 中的advice是不可数名词
14. a lot of == lots of 许多 15. as for至于
※ 16. health n., healthy adj. , healthily adv. , unhealthy adj.
17. help sb. (to) do
help sb. with
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Unit 2
句子
①What’s the matter(with sb.)? 怎么了？with为介词，后跟名词、代词或动名词。人称代词必须用它的宾格。
= What’s the trouble (with sb.)? = What’s wrong (with sb.)?
= Is there anything wrong (with sb.)?
②I’m not feeling well. 我觉得不太舒服，这里well表示身体状况，不能用good代替= I’m feeling ill/sick. =I feel terrible/bad.
③I have a stomach ache 我胃痛 = There is something wrong with my stomach
④ When did it start? 什么时候开始的？
⑤ You should drink more water. 表建议 You shouldn’t eat more.
核心知识
1. I’m sorry to hear
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※ 2. 情态动词 should 与shouldn’t 表建议
3. have a cold / stomachache / toothache / fever/ sore throat
4. feel 觉得，get 变得, sta