L88 Trapped in a mine
单词理解
语法理解
if条件状语分类：真实和虚拟，句式上有主将从现、主情从现、主祈从现(动原型)
1、功能：有条件、结论的语句
- If I win a lot of money, I will buy you a mink coat. #if所引导为从句，从句位于主句之前需要逗号分隔
- You will be very lucky if he lets you go without a ticket. #if所引导为从句，从句位于主句之后不需要逗号
- 条件：if you truly love nature,
- 结论：you will find beauty everywhere
2、连词：if / unless / as long as
unless 除非
- These skills will be useless unless you caryy them out
as long as 只要
- As long as you work hard enough,an iron rod can be ground into a needle #只要功夫深，铁杵磨成针
3、时态：真实/虚拟
条件状语从句：真实
真实语气用来表示真实条件下，很有可能发生的事情
现在真实：if...am/is/are/do/does..., ...will... #主将从现
过去真实：if...was/were/did..., ...would... #主过去从过去，客观事实从过去
if he is out, I'll call to morrow
The student would to study hard if the teacher gaved him another chance.
条件状语从句：虚拟
虚拟语气用来表示假设，或难以实现的情况，而非客观存在的事实
现在虚拟：if...were/did..., ...would...
过去虚拟：if...had done..., ...would have done...
if i were in your position. I would act differently
if you had hurried, you would have caught the train
练习：
课文理解
