第二册人教版UNIT8教案

16.If we know how to respond ,we can save lives.

17.If we were to get hurt trying to save someone , we would nor be able to help.

18.cover…..with…     press on……

19.We should never try to revive a person unless we know how to do it.

20.We should put the person in the recovery position.

Grammar

虚拟语气的用法

一、虚拟语气在条件句中的用法。

条件从句的谓语形式

主句的谓语形式

与现在事实相反

If 主语＋动词过去式

主语＋should/would/could/might+动词原形

与过去事实相反

If 主语＋had +动词过去分词

主语＋should/would/could/might+have+过去分词

与将来事实相反

If 主语＋动词过去式

             ＋should＋动词原形

             ＋were to＋动词原形

主语＋should/would/could/might＋动词原形

1.从句中若含有should, had 或者were，那么就可以把它们放在句首，与主语颠倒形成倒装，但动词过去式不可以与主语倒装。

2.件状语从句表示的行为和主句表示的行为所发生的时间不一致时，被称为“错综时间条件句”，动词的形式要根据它所表示的时间作出相应的调整。

3.词短语代替条件状语从句。常用的介词由with, without, but for等。

Intergrating Skills

1 prevent sb/sth (from)sth / doing sth 

stop sb (from) sth/ dong sth   

keep sb from sth. / doing sth

2 deal with