2011英语四级语法讲义大全：虚拟语气二

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注意问题：
1、If条件句中绝对不可出现“would”。
$ {! P2 O9 Q6 C" L2、根据句中的时间状语，有时可能出现“混合虚拟”的情况，即主句可能是现在的情况，条件句也许是发生在过去的情况，但都是遵守上述句型。
6 Z. n* [, O& w2 X% Z3、在条件句中如果出现were, had, should可省去if，将主语与这些词倒装，例如：
Had the doctor come last night, the boy would have saved.
& B8 a9 |7 ^- uWere I to go to the moon one day, I would see it with my own eyes.
( R/ i/ `* X+ [0 ]( B/ S9 e9 TShould it rain tomorrow, we would stay at home.
3 t6 t. Z- [1 y) q二、名词性虚拟语气：
3 t" E% f4 ^( c& H$ i( N在表示命令、建议要求、惊叹时的名词性从句中需用虚拟语气，基本句型：主语＋（should）＋动词原形，如：Mother insisted that John go to bed at 9 o’clock.（宾语从句）
7 E% h/ V  |3 k7 yWe suggested that the meeting should not be held.
It was required that the crops should be harvested at once.（主语从句）
The suggestion that he be invited was rejected.（同位语从句）
" K7 c4 k! @5 V& M; mThat is their demand that their wages be increased.（表语从句）
注意：在这种句子中绝不出现“would”“must”“could”等。