公本課堂：虛擬語(yǔ)氣在條件從句和結(jié)果主句中的用法

1)表示與現(xiàn)在事實(shí)相反的條件和結(jié)果

從句：If＋主語(yǔ)＋動(dòng)詞過(guò)去式（be動(dòng)詞用were）  主句：主語(yǔ)＋should/would/might/could＋do  

如：If I were you,，I should go and see the dentist at once. 假如我是你的話,，我會(huì)馬上去看牙科醫(yī)生。

2)表示與過(guò)去事實(shí)相反的條件和結(jié)果,。

從句：If＋主語(yǔ)＋had done   主句：主語(yǔ)＋should/would/might/could＋have done

如：If I had known of your arrival I should have met you at the station.如果我早知道你要來(lái),，我會(huì)去車站接你的。

3)表示與將來(lái)事實(shí)可能相反的條件和結(jié)果,。其用法和表示與現(xiàn)在事實(shí)相反的條件和結(jié)果相同,。

從句：If＋主語(yǔ)＋were to do/should do/動(dòng)詞過(guò)去式（be動(dòng)詞用were）

主句：主語(yǔ)＋should/would/might/could do

如：If it were Sunday tomorrow，my brother would go skating at the Beihai Park.如果明天是星期天,，我弟弟會(huì)去北海公園滑冰的,。