1.在以when引导的时间状语从句， 当从句是一般过去时态时，主句往往用过去进行时，表示在过去的某一时刻正在发生或正在进行的动作：
they were h**ing supper when i got to their home.
it’s time for sth /
it’s time to do sth /
it’s time for sb to do sth.
it’s time for us to start our lesson now.
作形式主语或形式宾语，其真正的主语或宾语是后面带to 的动词不定式：
it’s necessary to learn english well.
we found it difficult to work out the maths problems.
---to 句型too --for sb to do sth --对某人来说太---以致于不能---
the apples on the tree
are too high for me to reach.
kate is too young to go to school.
用法：形前名后， big enough enough foodenough to do sth
足够---能够---
jim is old enough to go to school., a little 修饰不可数名词 ; much 修饰不可数。
few a few 修饰可数名词； many 修饰可数。
a little a few 具有肯定含义little few 具有否定含义。
some, any , a lot of = lots of 既可以修饰不可数，也可以修饰可数名词；
there is a little time left, take it easy.
we’d better go shopping ,there are few eggs left.
mr. little doesn’t h**e much money. （否定句中常用much而不用a lot of ）
too 中心词是too, 常修饰形容词，it’s much too cold today,we should wear warm clothes.
too much中心词是much, 常修饰不可数名词，there’s too much water,please be careful..
不定代词：someone, anyone ; something , anything , nothing ; somebody , anybody, nobody.
something常用于肯定句和表示请求的疑问句中 ， anything用于否定句中和疑问句中，not anything = nothing
without anything = with nothing
would you like something to eat?
i’d like chinese tea with nothing in it .
形容词修饰不定代词要放在不定代词后面：
be quiet! i h**e something important to tell you.
is there anything interesting in today’s news*****?
形容词修饰名词，副词修饰动词：
what a strong wind!
it’s blowing strongly.
连系动词：be, feel, look, get,turn , taste, smell, become+ 形容词作表语。
7.感叹句：what + a/an + 形容词 + 可数名词的单数形式+ 主语+ 谓语！
what+ 形容词+ 可数名词的复数形式 / 不可数名词+ 主语+ 谓语！
how + 形容词或副词 + 主语+ 谓语！
what a nice day it is !
what beautiful flowers they are!
how happily they are playing!
8.反意疑问句：要注意前肯后否，前否后肯，要用be动词，助动词或情态动词来做，要注意否定词：
never, little, few, hardly ,nothing, nobody 等。
祈使句的反意疑问句用：will you ?
以let’s开头的反意疑问句用： shall we ?
she usually gets up at six, doesn’t she?
there’s little water in the bottle, is there?
please take these
books to the office, will you?
you h**e never been to new york, h**e you?
9.形容词和副词的比较级和最高级：要注意比较级和最高级的构成：
规则变化： 要双写的：big, fat, thin, red,不规则变化：
good, bad,far,ill,比较级用在：than ，a little + much + 最高级用在：
of all, of the three, in his class, in the world等表示有范围的短语中，one of + 最高级 + 可数名词的复数。
10.以so 引导的倒装句：表示---也一样，也如此，前后主语要不一致，要通过be动词、助动词、情态动词来做：
i reached home at 9:00, so did my brother.
canadians eat a lot of beef, so do chinese people.
neither --nor --
连接两个主语，谓语动词采用就近原则；
either of --或 neither of --谓语动词用单数；
both of---或 both---and --谓语动词用复数。
both of them are chinese.
neither of them is australian.
neither jim nor i am american.
keep + 名词 + 形容词。
keep the windows open, it’s hot here.
keep sb doing sth
i’m sorry i’ve kept you waiting for a long time.
keep表示“借”用于和一段时间连用：
how long can i keep this book?
/ make / h**e sb do sth
让（使）某人干某事。
let’s go to the zoo!
how did he make the baby stop crying?
to do sth
忘记去做某事。
remember to do sth
记得去做某事 forget doing sth 忘记做过某事 remember doing sth记得做过某事。
to do sth
停下来做另一件事情 stop doing sth 停止正在做的事情。
stop sb from doing sth
阻止某人干某事。
let’s stop to h**e a test, it’s too hot today.
when the teacher came into the classroom, the students stopped talking.
we plant trees to stop the wind from blowing the earth away.
begin / start
to do sth
/ ask sb to do sth
否定形式 tell / ask sb not to do sth.
policemen asked us not to play on the road , it was too dangerous.
our teacher told us a story
yesterday.
finish doing sth.
tom didn’t go to bed until he finished writing the composition.
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