第1个回答 2012-08-29
1) leave的用法
1.“leave+地点”表示“离开某地”。例如：
When did you leave Shanghai? 你什么时候离开上海的？
2.“leave for+地点”表示“动身去某地”。例如：
Next Friday, Alice is leaving for London. 下周五，爱丽斯要去伦敦了。
3.“leave+地点+for+地点”表示“离开某地去某地”。例如：
Why are you leaving Shanghai for Beijing? 你为什么要离开上海去北京？
3) What...? 与 Which...?
1. what 与 which 都是疑问代词，都可以指人或事物，但是what仅用来询问职业。如：
What is your father? 你父亲是干什么的？
该句相当于：
What does your father do?
What is your father's job?
Which 指代的是特定范围内的某一个人。如：
---Which is Peter? 哪个是皮特？
---The boy behind Mary. 玛丽背后的那个男孩。
2. What...?是泛指，所指的事物没有范围的限制；而 Which...?是特指，所指的事物有范围的限制。如：
What color do you like best? （所有颜色）
你最喜爱什么颜色？
Which color do you like best, blue, green or yellow? （有特定的范围）
你最喜爱哪一种颜色？
3. what 与 which 后都可以接单、复数名词和不可数名词。如：
Which pictures are from China? 哪些图片来自中国？
4) 频度副词的位置
1.常见的频度副词有以下这些：
always（总是，一直） usually（通常） often（常常，经常）
sometimes（有时候） never（从不）
2.频度副词的位置：
a.放在连系动词、助动词或情态动词后面。如：
David is often arrives late for school.大卫上学经常迟到。
b.放在行为动词前。如：
We usually go to school at 7:10 every day.我们每天经常在7：10去上学。
c.有些频度副词可放在句首或句尾，用来表示强调。如：
Sometimes I walk home, sometime I rides a bike.有时我步行回家，有时我骑自行车。
3.never放在句首时，主语、谓语动词要倒装。如：
Never have I been there.我从没到过那儿。
5) every day 与 everyday
1. every day 作状语，译为“每一天”。如：
We go to school at 7:10 every day.我们每天7：10去上学。
I decide to read English every day.我决定每天读英语。
2. everyday 作定语，译为“日常的”。
She watches everyday English on TV after dinner.她晚饭后在电视上看日常英语。
What's your everyday activity?你的日常活动是什么？
6) forget doing/to do与remember doing/to do
1.forget to do 忘记要去做某事。 (未做)
forget doing 忘记做过某事。 (已做)
The light in the office is still on. He forgot to turn it off.
办公室的灯还在亮着，它忘记关了。(没有做关灯的动作)
He forgot turning the light off. 他忘记他已经关了灯了。 ( 已做过关灯的动作)
Don't forget to come tomorrow .别忘了明天来。 (to come动作未做)
典型例题
---- The light in the office is still on.
---- Oh，I forgot___.
A. turning it off B. turn it off
C. to turn it off D. having turned it off
答案：C。由the light is still on 可知灯亮着，即关灯的动作没有发生，因此用forget to do sth.而forget doing sth 表示灯已经关上了，而自己忘记了这一事实。此处不符合题意。
2.remember to do 记得去做某事 (未做)
remember doing 记得做过某事 (已做)
Remember to go to the post office after school.记着放学后去趟邮局。
Don't you remember seeing the man before? 你不记得以前见过那个人吗?
7) It's for sb.和 It's of sb.
1.for sb. 常用于表示事物的特征特点，表示客观形式的形容词，如easy, hard, difficult, interesting, impossible等：
It's very hard for him to study two languages. 对他来说学两门外语是很难的。
2.of sb 的句型一般用表示人物的性格，品德，表示主观感情或态度的形容词，如good, kind, nice, clever, foolish, right。
It's very nice of you to help me. 你来帮助我，你真是太好了。
3.for 与of 的辨别方法：
用介词后面的代词作主语，用介词前边的形容词作表语，造个句子。如果道理上通顺用of，不通则用for。如：
You are nice. (通顺，所以应用of)。
He is hard. (人是困难的，不通，因此应用for。)
8) 使用-ing分词的几种情况
1.在进行时态中。如：
He is watching TV in the room.
They were dancing at nine o'clock last night.
2.在there be结构中。如：
There is a boy swimming in the river.
3.在have fun/problems结构中。如：
We have fun learning English this term.
They had problems getting to the top of the mountain.
4.在介词后面。如：
Thanks for helping me.
Are you good at playing basketball.
5.在以下结构中：
enjoy doing sth 乐于做某事 finish doing sth 完成做某事
feel like doing sth 想要做某事 stop doing sth 停止做某事
forget doing sth 忘记做过某事 go on doing sth 继续做某事
remember doing sth 记得做过某事 like doing sth 喜欢做某事
keep sb doing sth 使某人一直做某事 find sb doing sth 发现某人做某事
try doing sth 试图做某事 need doing sth 需要做某事
prefer doing sth 宁愿做某事 mind doing sth 介意做某事
practice doing sth 练习做某事 be busy doing sth 忙于做某事
can't help doing sth 禁不住做某事 miss doing sth 错过做某事
see/hear/watch sb doing sth 看到/听到/观看某人做某事
9) 英语中的“单数”
1.主语的第三人称单数形式，即可用“he, she, it”代替的。如：
he, she, it
my friend, his teacher, our classroom, Tom, Mary's uncle
2.名词有单数名词和复数名词。如：
man（单数）---men（复数） banana（单数）---bananas（复数）
3.动词有原形，第三人称单数形式，-ing分词，过去式，过去分词。如：
go---goes---going---went---gone
work---works---working---worked---worked
watch---watches---watching---watched---watched
当主语为第三人称单数的时候，谓语动词必须用相应的第三人称单数形式。如：
The boy wants to be a sales assistant.
Our English teacher is from the US.
Their daughter makes her breakfast all by herself.
10) 双写最后一个字母的-ing分词
初中阶段常见的有以下这些：
1.let→letting 让 hit→hitting 打、撞
cut→cutting 切、割 get→getting 取、得到
sit→sitting 坐 forget→forgetting 忘记
put→putting 放 set→setting 设置
babysit→babysitt 临时受雇照顾婴儿
2.shop→shopping 购物 trip→tripping 绊
stop→stopping 停 drop→dropping 放弃
3.travel→travel(l)ing 旅游 swim→swimming 游泳
run→running 跑步 dig→digging 挖、掘
begin→beginning 开始 prefer→preferring 宁愿
plan→planning 计划