什么情况下用虚拟语气?

如题所述

insist(坚持)、order/ command(命令)、suggest/ advise/ propose(建议)、demand/ require/ ask/ desire(要求)后面跟虚拟语气。

例1:The examination instructor asked that the students(should)not use a calculator.考官要求学生不要使用计算器。

例2:The workers demanded that their wages(should)be raised by 10 percent.工人们要求增加百分之十的工资。

比较:动词 suggest和insist 后面的宾语从句,应根据不同情况选用陈述语气或虚拟语气。

suggest作“建议”解时,用虚拟语气,作“使想起、暗示”解时,用陈述语

例:His silence suggested that he agreed with my decision.他的沉默暗示他赞同我的决定。(暗示)

例:He suggested that I(should)stick to my decision.他建议我坚持自己的决定。(建议)

insist作“坚决要求”解时,用虚拟语气,作“坚持认为”解时,用陈述语气。

例:He insists that doing morning exercises does good to people's health.他坚持认为做早操对健康有益。(强调)

例:He insists that he(should)do morming exercises every day.他坚持每天都要做早操。(要求)

扩展资料

1、名词性从句中要用过去时或should+动词原型构成虚拟语气。如:It is time we went home.

2、wouldrather,hadrather后的从句动词用相当于陈述语气的过去时来表示现在或将来发生的动作。如:I would rather you went with her.我宁愿你跟她走。

只有当wouldrather后面动作的主体与前面主语一致时才可以用不带to的动词不定式,如:I’d rather take the important letter with me.在这个句子中,rather后面的主语为I,和前面的主语一致,所以用的不是过去式,而是不带to的动词不定式。

3、在itisimportant/suggested/necessary/proposed等结构后的主语从句中要用虚拟语气表示应该做什么事情,即用动词原形或should+动词原型,如:It is important that you(should) be here on time.

4、词组but for相当于were it not for或had it not been for,表示一种含否定意义的条件,后面一般加名词或名词短语,如:He might have been killed but for the arrival of the police.要不是警察来了他本可能被杀死。

5、在某些表示祝愿的句子里需要用虚拟语气,如:May you be happy all your life!

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