文档介绍：条件状语从句
真实性条件状语从句:                   
条件状语从句: If it rains tomorrow , I will stay at home.（主将从现）            
  If it rains tomorrow , I can stay at home.(主情从现）    If it rains tomorrow , please come to my home .（主祈使句从现）也就是从句一定要一般现在时，从句就是与if连在一起的那个句子，也可整个句子提前。
I will stay at home,if I it rains tomorrow
经典语句：
If it doesn't rain tomorrow,we will go to the zoo.
If you open the door，i will come in.
If you don’t hurry, we’ll miss the train.

If you feel better, you can get up
间接引语从句
直接引语变间接引语时态的改变对应规则
时态的改变直接引语间接引语一般现在时一般过去时现在进行时过去进行时现在完成时过去完成时一般过去时过去完成时一般将来时过去将来时can, may, must could, might, had to 
直接引语变成间接引语时，情态动词的变化。
直接引语中间接引语中 may might can could will would won’t wouldn’t going to would can’t couldn’t must had to
She said: ‘ My brother wants to go with me.’
_____________________________.
She said: ‘ I have lost a pen.’
_____________________________.
She said: ‘ I am going to get married next week.’
——————————————————。
may, might 表示可能性
may, might都可以表示“可能”、“也许”。might表示的可能性要比may小。
1. may表示现在或将来的可能性
may+ 动词原形
2. may也可表示过去的可能性
may have done
比较：
He is working.
He may be working.
He must be working.
He may have been working.
宾语从句
Can you tell me __ you were born?
C. when
I don’t know __ they have passed the exam.
A. what D. where
Do you know __ they listened to yesterday.
A. what C. why
You must remember ___.
your mother said.
did your mother say
mother said what
has your mother said.
Did you know___?
A. who he was looking after.
was he looking after
he is looking for
he is looking after
定语从句
I want to buy the books .they are on the ）
I want to buy the ................on the counter。
改错：
This is the book that I bought it yesterday.
He is the man gave me a book yesterday.
英语中及物动词有两种语态，即主动语态和被动语态。主动语态表示主语是动作的执行者被动语态表示主语是动作的承受者。被动语态由“助动词be 及物动词的过去分词”构成。助动词be有人称、时态和数的变化。　　一、被动语态的用法：