unit 4 what would you do?
section a
1. 虚拟语气。
what would you do if you + 过去时？ -i would + v.原形。
if + 主 + 句子（过去时），主 + would + v.原形。（i后面加be动词时，要用were）
2. research n. 研究 (medical research = research on medicine)
3. what if...what(shall i do) if...条件状语从句）
要是（如果）..该怎么办？
假设可以成立，用主将从现；②与事实相反，用虚拟语气，即what if + 过去时？
what if the disaster in 2012 happened?
4. if（是否）引导宾语从句：主句谓语动词为过去时，从句相应变为过去时态。
① can i pass the entrance exam? i don’t know.
i don’t know if i can pass the entrance exam.
does he stay up studying every night? she wondered.
she wondered if he stayed up studying every night.
5. before/after + 从句(conj.) 或 doing sth. (prep.)
section b
6. permit v. 《书》 允许。
permit + do/n./doing 允许（某人）做某事 （与allow用法相同）
permission n. （ask one’s permission 征求某人允许）
7. pretty/fairly 相当地（程度副词） 在程度上比较，pretty/rather > quite > fairly
各程度副词在句中的位置：
so: it’s so interesting a book. (so + adj. +不定冠词)
such/quite: it’s such an interesting book. (so + 不定冠词 + adj.)
very/pretty/fairly...it’s a very/pretty/fairly interesting book.
8. such用法：①如上(such a/an + adj. +n.) such + adj. +n.[c](pl.)/u]
such a + n.[c](sing) such a boy.
9. not...in the slightest = not...at all 一点也不。
10. bother v. 打扰 i am busy. don’t bother me right now.
i am sorry to bother you, but can you help me?
annoy v. 使。生气→make...angry
i was annoyed with him because he kopt in interrupting.
11. company n.[u] being with. 陪伴。
i am gradeful for your company on the journey.
12. 意为“宁可。也不。的句型。
would rather + v. 原形 + than + v. 原形。
would + v. 原形 + rather than + v. 原形。
prefer + to do + rather than + do sth. （指“这一次”）
prefer + doing/n./pron. +to + doing sth. （指“一般/通常情况下”）
self check
13. knowledge n.[u] 知识 knowledgeable adj. 知识渊博的 （able为形容词后缀）
14. represent v. 代表，表示 (represent重音在-sent上)
the red lines represent railways.
15. come top in ..在。名列前茅。
16. the rest of + n.[c](pl.) the不可省略；rest n. 剩余部分)
17. let sb. down 让某人失望 (let sth. down 让某物掉下)
i count on you to support me. don’t let me down. (count on 指望于)
18. think of ①to create an idea in your imagination. 想出。
who first thought of the plan?
sb. 为。考虑，着想 she never thinks of others, just herself.
what do you think of/about...你认为。怎么样？
think highly of sb. 高度赞扬某人。
think about 思考，考虑 let me think about it. （about 为介词）
think over 深思熟虑 me think it over. （over为副词）
19. come up with → find an answer/solution to solve sth. 想出。
reading
20. come out ① be published 出版。
= appear 出现（指太阳，月亮，星星等）
开花 ④to become known
it was only after his death that the truth came out.
21. near和nearby （附近的）
作形容词的定语时，near表时间；nearby表空间。
we live in a nearby village.
we hope to meet again in the near future
作副词的状语时，意思相同。
near还可以作介词 stand near the window.
22. by accident 不小心，意外地 by chance 偶然地 by mistake 错误地。
23. cloth n.[u]布 a metre of cloth n.[u]有专门用途的布（如纱布）
clothes n.(pl.) 衣服。
clothing n.[u](formal)
24. hurry to do sth. =do sth. in a hurry 着急做某事。
25. hurt ①vt.(=injure) 伤害，伤到 (a part of body)/sb. +be/get + hurt/injured
vi. 疼 my knee got injured and it hurt terribly.
(a part of body) +hurt = 主 + feel pain/painful in + a part of body)
i felt some pain/painful in my knee.
26. 为某人提供某物 ①offer sb. sth. =offer sth. to sb.
provide sb. with sth. =provide sth. for sb.
27. hide sth. from sb. 把某物藏在某人找不到的地方 (hide-hid-hidden)
put sth. beyond one’s reach 把某物放到某人够不到的地方 (beyond 超出。范围)
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