1) 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。
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。
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。
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。
the boy wants to be a sales assistant.
our english teacher is from the us.
their daughter makes her breakfast all by herself.
2) 什么是助动词。
1.协助主要动词构成谓语动词词组的词叫助动词。被协助的动词称作主要动词。
助动词自身没有词义不可单独使用
he doesn't like english. doesn't是助动词，无词义 like是主要动词，有词义。
2.助动词协助主要动词完成以下功用，可以用来。
a. 表示时态
he is singing.
he has got married.
b. 表示语态
he was sent to england.
c. 构成疑问句。
do you like college life?
did you study english before you came here?
d. 与否定副词not合用，构成否定句
i don't like him.
e. 加强语气
do come to the party tomorrow evening. did know that.
3.最常用的助动词： be, h**e, do, shall, will, should, would
3) 不定冠词a与an的使用。
用在以辅音音素开头的单词前。
there is a "b" in the word "book". 单词book中有个字母b。
类似的字母还有c, d, g, j, k, p, q, t, u, v, w, y, z。
she has a small knife. 她有一把小刀。
用于以元音音素开头的单词前。
there is an "i" in the word "onion". 单词onion中有个字母i。
类似的字母还有a, e, f, h, l, m, n, o, r, s, x。
do you h**e an umbrella? 你有一把雨伞吗
3.以元音字母开头的单词前面不一定都用an,以辅音字母开头的单词前面也不一定都用a。
a useful book a universe a one-letter word
an hour an uncle an umbrella an honest person
4) le**e的用法。
1.“le**e+地点”表示“离开某地”
when did you le**e shanghai?
2.“le**e for+地点”表示“动身去某地”
eg. next friday, alice is le**ing for london. 3.“le**e+地点+for+地点”表示“离开某地去某地”
why are you le**ing shanghai for beijing?
4. le**e sth. in/ at sp. 把某物遗忘在某地。
i left my bag in the classroom.
5) 情态动词should“应该”
should作为情态动词用常常表示意外、惊奇、不能理解等有“竟会”的意思
how should i know? why should you be so late today?
should有时表示应当做或发生的事。
we should help each other.
我们在使用时要注意以下几点
1. 用于表示“应该”或“不应该”的概念。此时常指长辈教导或责备晚辈。
should be here with clean hands. 你应该把手洗干净了再来。
2. 用于提出意见劝导别人。
you should go to the doctor if you feel ill. 如果你感觉不舒服你最好去看医生。
3. 用于表示可能性。should的这一用法是考试中常常出现的考点之一。
we should arrive by supper time. 我们在晚饭前就能到了。
she should be here any moment. 她随时都可能来。
6) 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。 is your father?
你父亲是干什么的= 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。
--which is peter? 哪个是皮特
--the boy behind mary. 玛丽背后的那个男孩。
2. what..泛指所指的事物没有范围的限制，而 which..特指，所指的事物有范围的限制。
color do you like best? 所有颜色
color do you like best, blue, green or yellow? 有特定的范围
3. what 与 which 后都可以接单、复数名词和不可数名词。
pictures are from china? 哪些**来自中国
7)频度副词的位置。
1.常见的频度副词有以下这些
always总是》 usually通常》 often常常 > sometimes有时候》 seldom/hardly ever >never
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。 d**id is often arrives late for school.
b.放在行为动词前。 usually go to school at 7:10 every day.
c.有些频度副词可放在句首或句尾，用来表示强调。sometimes i walk home, sometime i rides a bike.
放在句首时，主语、谓语动词要倒装。 never h**e i been there.
8) every day 与 everyday 1. every day 作状语译为“每一天”。
we go to school at 7:10 every day.
i decide to read english every day.
2. everyday 作定语译为“日常的”。
she watches everyday english on tv after dinner.
what's your everyday activity? 你的日常活动是什么
9) forget doing/to do与remember doing/to do
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. (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. h**ing turned it off 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？
10) it's for sb.和 it's of sb.
sb.常用于表示事物的特征特点，形容词有：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。
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