第1个回答 2010-04-01
对将来的虚拟时用should/were to do +v 原形,而且这是选情态动词的虚拟
这台打印机质量很好。如果一年内损坏,我们负担费用来修好它
剧中的if+would表示要用虚拟语气来做
至于A,第一个就不选,if主句will了,从句,再加个will,读一下就不会去选
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将来情况的虚拟条件句
1.表现现在和将来情况的虚拟条件句,动词形式可以表示如下:
条件从句中的谓语: 主句谓语
相当于过去式的形式: would+动词原形
这类句子或表示与事实相反的情况或实现可能性不大的情况:
If I had a map I would lend it to you.如果我有地图我就借给你。(但我没有)
If you left your bicycle outside,someone would steal it.如果你把自行车放到外面,有人会偷的。(当然你不会那样做)
在If I were you这样的句子中,were不能改成was,但在第三人称单数后,用was也可以:
If Helen were(was) here how nice it would be!
2.在主句中谓语有时也可用might,could构成:
If you tried again you might succeed.如果再试一次,你可能会成功。
3.在条件从句中有时还可以用“were to +不定式”(a)或“should+不定式”(b)这两种形式:
a.If he were(was) to resign,who would take his place?如果他要辞职,谁来接替他?
b.If you should have any difficulty in getting the medicine,(you could) ring this number.如果你找这种药有困难,(你可以)拨打这个电话。
在后面这类句子中,主句的谓语有时可用祈使语气,或用陈述语气。
If the toys should arrive in a damaged condition,please inform us at once.如果这些玩具运到时有损坏,请立即通知我们。
If I should free tomorrow,I will come to see you.如果明天我有空,我会来看你的。
4.在某些条件从句(如包括were和should 的从句)中,if有时可以省略,这时语序要改为倒装:
Were I Tom I would refuse.如果我是汤姆我会拒绝。
Should she be interested,I'll phone her.如果他有兴趣,我会给她打电话。
5.从句有时可用If it were not for这种句型,表示“若不是”:
If it were not for your help,we would be in serious trouble.如果不是你帮忙,我们会遇到大麻烦。
6.在极少情况下,从句中的谓语可用动词原形,主句中的谓语可用陈述语气:
If any person be found guilty,he shall have the right of appeal.如果有人被判定有罪,他应有上诉权。
这是比较大气的说法,口语中很少使用。