文档介绍：1. by + doing 通过……方式如:by studying with a group
   by 还可以表示:"在…旁","靠近","在…期间"、"用,""经过","乘车"等
如:I live by the river.                 I have to go back by ten o'clock.
   The thief entered the room by the window.     
The student went to park by bus.
2. talk about 谈论,议论,讨论
 如:The students often talk about movie after class. 学生们常常在课后讨论电影。
   talk to sb. === talk with sb. 与某人说话
3. 提建议的句子:
   ①What/ how about +doing sth.? 
   ②Why don't you + do sth.?  
③Why not + do sth. ?          
④Let's + do sth.            
⑤Shall we/ I + do sth.?    
4. a lot 许多  常用于句末
5. too…to 太…而不能  常用的句型 too+adj./adv. + to do sth.
6. aloud, loud与loudly的用法     三个词都与"大声"或"响亮"有关。
   ①aloud是副词,重点在出声能让人听见,但声音不一定很大,
常用在读书或说话上。通常放在动词之后。aloud没有比较级
形式
   ②loud可作形容词或副词。用作副词时,常与speak, talk,
laugh等动词连用,多用于比较级,须放在动词之后。
   ③loudly是副词,与loud同义,有时两者可替换使用,但往往
含有令人讨厌或打扰别人的意思,可位于动词之前或之后。
7. not …at all 一点也不  根本不 
  not经常可以和助动词结合在一起,at all 则放在句尾
8.    be / get excited about sth.=== be / get excited about doing sth.  
      === be excited to do sth. 对…感兴奋
9. ① end up doing sth    终止做某事,结束做某事  如
② end up with sth.    以…结束
10.  first of all 首先.    to begin with 一开始     later on 后来、随
11.  also 也、而且(用于肯定句)常在句子的中间
     either 也(用于否定句)常在句末
     too  也(用于肯定句)   常在句末
12. make mistakes 犯错    make a mistake 犯一个错误
13. laugh at sb. 笑话;取笑(某人)
14. take notes 做笔记,做记录
15. enjoy doing sth . 喜欢做…乐意做…
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