虚拟语气用在目的状语从句中 在由lest , for fear that , in order that , so that , in case of 等引导的目的状语从句中需用虚拟语气.表示“以防.以免 等意思.其谓语动词多由should / could / might + 动词原形构成.should也可省略. He was punished lest he should make the same mistake again．他被处以惩罚以免他再犯. I reminded her twice of it lest she should forget . 我提醒她两次.怕她忘记 I will not make a noise for fear that I should disturb him . 我不会出声的.以免打扰他 I have come all the way here in order that you should understand me . 我到这里来为的是你能理解我 He put his coat over his son in case he should catch cold . 他把大衣盖在儿子身上以免他着凉 注意:如果 in order that 和 so that 前的主句是现在时.其后的从句有时也可用 can , may + 动词原形. Ask him to hurry up with the letters so that I can sign them . 让他带着信赶快来以便我签字 在以lest 和in case 引导的目的状语从句中谓语动词若属于过去时.一般要用虚拟语气. should + 动词原形.若谓语动词不是过去时.也可以用成述语气. take warm clothes in case the weather is cold . 带上厚衣服以防天变冷. 【查看更多】
