从句与虚拟语气

1.宾语从句中，谓语动词insist(坚持要求),ask, suggest(建议), order, propose(建议), demand(要求),advise, command(命令),request(要求), require(要求),desire(希望),recommend(劝告)后的宾语从句用虚拟.多用动词原形.既(should)+动词原形.

He suggested that a petition(should) be drawn up (起草请愿书)

He insisted that Jennie send her to dancing school.

但当insist表示 “坚持认为”和 suggest表示“表明”时, 其后的从句不用虚拟语气.

He insisted that he was honest. The look on his face suggested that he was angry.

2. 名词性从句中，虚拟语气用在表要求, 建议, 命令的同位语从句,即suggestion, advice, demand, order, requirement, request, proposal, desire等名词所在的句子里的名词性从句, 谓语动词应为 “should+ 动词原形”, 但如果是定语从句则为陈述语气.

What do you think of his suggestion that we (should ) put on a play?

Their order is that their output(产量) (should) be increased by 20%.

It is important that he (should) work hard.

They expressed the wish that they be given more free time.

3. 虚拟语气用在as if, as though, so that, in order that引导的方式状语从句中.表示现在用过去时, 表过去用过去完成时.

I loved you as if you were my son.

I remember it vividly(清楚的)as though it were tonight.

在look, seem, taste, smell后, as if引导的从句可用陈述语气.

The milk smells as if it is sour.

4. 在in case, for fear (that), lest “以免…”引导的从句中, 谓语用 “should+动词原形”

She took her raincoat with her in case (for fear that, lest) she (should) be caught in the rain.

5.虚拟语气在主语从句中的用法. 在 ①“It is important (strange, natural, necessary) that…”②It’s a pity/a shame/No wonder…that…③It is suggested/requested/proposed/desired…that…句型里, 从句谓语动词常用 “should+动词原形”, 表示某事重要, 自然, 奇怪, 必要或惊奇,惋惜,必须等意义. should可省略.

It’s very strange that she (should) leave without saying goodbye.