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。
(1)suggest作"建议"讲时,从句用虚拟语气;作"表明,暗示"讲时,用陈述语气。
He suggested that I (should) stick to my decision.
他建议我坚持自己的决定。(建议)
His silence suggested that he agreed with my decision.他的沉默暗示他赞同我的决定。(暗示)
(2)insist作"坚决要求"讲时,从句用虚拟语气;作"坚持说,坚持认为"讲时,用陈述语气。
He insists that he (should) do morning exercises every day.他坚持每天都做早操。(坚决要求)
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。(坚持认为)
4.would rather之后的宾语从句中用虚拟语气,表示"宁愿让别人做某事"。
(1)用动词过去式表示现在或将来要做的事。
Don't come tomorrow.I'd rather you came next weekend.明天别来,我宁愿你下个周末来。
(2)用动词的过去完成式表示过去的动作。
I'd rather you hadn't done that.
我宁愿你没做过那件事。
(二)在句型"It is (high/about) time+that从句"中,从句中须用虚拟语气,从句谓语动词用过去式或"should+动词原形(should不可省略)",表示"是做某事的时候了"。
It is high time that the children went/should go to bed.到了孩子们睡觉的时间了。
(三)由as if和as though引导的状语从句表示方式时,意思是"好像",这时从句中常用虚拟语气。其从句谓语动词用一般过去时(be动词用were)表示所说的内容与现在的事实相反;用过去完成时表示所说的内容与过去的事实相反。
He speaks English as if he had learned it in English-speaking countries.
他的英语讲得就像他在讲英语的国家学过似的。
注意:如果说话人讲的内容与事实相符,as if从句中用陈述语气。
It looks as if it's going to rain.看起来要下雨了。
(四)if only引导的感叹句, 表示"如果......就好了",可使用虚拟语气,也可用于陈述语气。
If only I had taken her advice last week.(=I wish I had taken her advice last week.)
如果上星期我接受她的建议就好了。
If only he comes early.但愿他早点回来。