人教版七年级英语上册 Unit 7 How much are these socks 知识点

Unit 7 How much are these socks ？一.含有实义动词用法的做题规律1.I→am→am not→V原→do→don't2.He/she/it/this/that/人名/名单/形物代+名单→is→is not→V单→does→doesn't3.We/you/they/these/those/名复/形物代+名复→are→are not→V原→do→don't do/don't/does/doesn't引导句子后都用V原形；二.英语中常见询问物品价格用语:1.How much is+the/this/that +单数名词物品/it ?           ...多少钱？  It's +基数词+货币单位 . 2.How much are+the / these / those +复数名词物品/they?         …多少钱？  They're +基数词+货币单位.3.What's the price of...? =How much is/are....?/ What's the price of...?It's +基数词+货币单位 .三.用法1.Can I help you ？/What can I do for you ？/May I help you？Yes,please./No,thanks.2. I'll take it./I'll take them.3.Here you are.4.buy sb.sth.=buy sth.for sb. 给某人买某物buy sth. from...         从...购买某物5.sell sb.sth.=sell sth.to sb.  把某物卖给某人6.at a great sale相当于on sale，意为“减价出售”。7.辨析for sale与 on salefor sale 表示“待售；供出售”on sale  表示“出售、减价出售”8. 介词for用来表示物品的价格：价格+for+具体物品;Eg：30 dollars for shirt. 9.at very good prices  以很优惠的价格at a low/high price  以低价/高价 10.the price of   ...的价格；the price of+其它；作主语时,谓语动词用单数；Eg：The price of this car is very high.11.expensive/cheap/high/low的区别1)expensive 描述物品贵；2)cheap 描述物品便宜；3)high 表示价格高；4)low 表示价格低；12.hundred,thousand,million(百万),billion(亿)等词，与具体数字连用时，用单数形式，其后不加s和of；当前面没有具体数字时,s和of都加上；
Eg: three hundred men teachersEg: hundreds of women teachers13.辨析：clothes与clothingclothes 指衣服、服装，作主语时，谓语动词用复数；clothing 指衣服，尤其是某种类型的服装，不可数，作主语时，谓语动词用单数；clothes 指衣服、服装，作主语时，谓语动词用复数；不能直接与数词连；但可以用these/those/some等词语修饰，表示一套衣服用“a suit of clothes”，谓语动词的单复数由suit的单复数决定；拓展：和a suit of 用法相同的还有：a set of；a pair of； 14.表示货币等度量单位作主语时，谓语动词用单数；Eg:100 dollars is quite a lot of for him.15.trousers,socks,shorts,shoes等物品常常成双成对出现，它们作主语时，谓语动词常用复数形式。16.need to do sth. 主语多为人；  need doing sth. 主语多为物；17.look用做系动词，意为“看上去”，后接形容词；     look 的相关短语：look at  看；         look after 照顾，照料；look like 看起来像；  look for   寻找