3. pay的基本用法是：

　(1) pay (sb.) money for sth. 付钱（给某人）买......。

　例：I have to pay them 20 pounds for this room each month. 我每个月要付20英磅的房租。

(2)pay for sth. 付......的钱。

例：I have to pay for the book lost. 我不得不赔丢失的书款。

(3)pay for sb. 替某人付钱。

例：Don?蒺t worry!I'll pay for you. 别担心， 我会给你付钱的。

(4)pay sb. 付钱给某人。

例: They pay us every month.他们每月给我们报酬。

十三. through prep. 以；凭借；穿过

　　He became rich through hard work and ability. 他凭借辛苦的工作和能力变得富有。

　　The sunlight was coming in through the window.

　　through，across，over

　　through意为"穿过"，指从物体的里面穿过。

　　across意为"穿过"，指从物体的表面通过。

　　over意为"越过；跨过"，指越过一个有高度的物体。

　　They walked through the park after supper.

　　I swam across the river and felt very tired.

　　Can you jump over the table?

十四. however "然而，不过"。可以位于句首、句中、句末。但要用逗号与句子的其他部分隔开。

Eg: She was ill. However, she still went to work. 她病了，然而她依然去上班。

辨析：but和however

but 直接连接前后两个句子，转折的意味比however强，特别表示非常明显的对比，。

However "然而，但是"。 不能直接连接句子，必须用逗号与句子隔开。

Eg:1.It began to rain, ___________ ,we went out to look for the boy.

2. It a sunny morning，___________very cold. 这是个晴朗的早晨，但是却很冷。

十五. more than 相当于over。意为"超过，多余"。

There are more than 2000 books.

十六. less than six. 少于6小时。

less than 意为"不到，少于"。其反义词为 more than \ over "多余，超过"

Eg：She sleeps less than seven hours every night. 他每晚的睡眠时间不到7小时。

We know Tom for 20 years. 我们认识Tom超过20年了。

拓展： less 是little的比较级，She has less milk than me.

二十二. none

　　none 与no one, nobody 的用法区别

　　1. no one=nobody，两者均只能指人，作主语时，谓语动词一般用单数。如：

　　No one [Nobody] ________ 谁也不知道。

　　No one [Nobody] _________ it. 没人喜欢它。

　　注：按传统语法，两者之后均不能接 of 短语。

　　2. none 既可指人也可指物，其后通常接 of 短语；用作主语若指不可数名词，谓语只能用单数，若指可数名词，则谓语可用单数或复数。

　　None of the food was left. 一点食物都没留下。

　　None of the books is [are] interesting. 没有一本书有趣。

　　3. none 暗示一种数量，"一个也没有"，而 no one 或 nobody 指"谁都没有"，回答 how many 或 how much 的提问时，通常用 none，而在回答 who 的提问时，通常用 no one 或 nobody。体会：

　　A：How many English books have you read? 你读过多少本英文书?

　　B：None. 一本也没读。

　　A：How much money did you give her? 你给了她多少钱?

B：None. 一分也没给。