2019高考二輪復習英語教案: 情態動詞和虛擬語氣

seize the chance , otherwise you would regret it . 如果不抓住這個機會，你會后悔的
he felt very tired yesterday , or he would have helped you . 他昨天覺得很累，不然會幫你的
4. 通過分詞短語表示條件
given more time, we could have done it better.
legalizing this drug would have disastrous consequence . 使毒品合法化會有災難性的后果
5. 用動詞不定式表示條件
it would be a mistake not to help him.
she would have done anything to make amends . 她會做任何事來彌補
特殊情況：情態動詞在日常用語中用得很多，使句子顯得比較委婉；這類謂語算不算虛擬語氣很難說，但有兩點是肯定的：
一是它們不受時態的影響，雖然形式接近過去式，卻常指現在的情況，而且和虛擬語氣在形式上一致，在不少情況下幾乎可以說是一種含蓄的虛擬條件句；
二是它們不表示事實，常帶有主觀色彩，因而使句子顯得很委婉。
i should think that might be a good solution .
could i trouble you with a question ?
could you lend me some money ?
would you mind taking part ?
would you like some tea ?
七、虛擬語氣在賓語從句中的運用
1.  虛擬語氣用在would rather，would（just）as soon，would sooner，would prefer（希望）等后接的賓語從句中。意指某人寧愿讓另一個人做某事，其后的賓語從句的謂語動詞需用虛擬語氣。若表示現在或將來要做某事，從句謂語動詞需用一般過去時，表示過去已經做的事，從句謂語動詞用過去完成時。
the manager would rather his daughter did not work in the same office.經理寧愿她女兒不與他在同一間辦公室工作。
to be frank，i'd rather you were not involved in the case.坦率地說，我希望你不要卷入這件事。
you don't have to be in such a hurry.i would rather you went on business first.你沒有必要這么著急，我寧愿你先去上班。
i'd rather you didn't make any comment on the issue for the time being.我倒希望你暫時先不要就此事發表意見。
frankly speaking ，i'd rather you didn't do anything about it for the time being.坦白地說我寧愿你現在對此事什么也不做。
wouldn't you rather your child went to bed early？為什么你不愿讓你的孩子早點上床呢？
【點撥】①若某人愿自己做某事， would rather后用動詞原形 
 i would rather stay at home today.
② would rather...than...中用動詞原形          
 i would rather stay at home than go out today.
2. 在表示命令、建議、要求等一類動詞后面的從句中，像order, suggest, propose, require, demand, request, insist, command,
insist + （should） do
i suggest that we （should） hold a meeting next week. 我建議下周召開個會議。
he insisted that he （should ） be sent there.他要求被派到那兒去。
【點撥】如suggest, insist不表示"建議" 或"堅持要某人做某事時"，即它們用于其本意"暗示、表明"、"堅持認為"時，賓語從句用陳述語氣。