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===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。 |
