4、虚拟语气还可用在定语从句中，表示："早该做某事了"时，定语从句中的谓语动词须用虚拟语气，其虚拟语气的结构为：It is (high / about) time that + 主语+ 动词的过去式/ should + do（优先使用动词过去式） ，即从句用虚拟过去式。

It is time that I went to pick up my daughter at school.我该去学校接我的女儿了。

It is high time you should go to work.你早该上班了。

虚拟语气误区

1.混合条件句的主从句时态不会灵活变化；

2.省略if时，句子调整不正确；

3.不会去找意思中的"应该"含义；

4.陷在虚拟中出不来，把真实条件句当成虚拟条件句。

【典型例题】

1） If I had seen the movie, I ______________ you all about it now.

A. would tell B. will tell C. have told D. would have told

2）The volleyball match will be put off if it ___.

A.will rain B. rains C. rained D. is rained

3）_____ to do the work, I should do it some other day.

A. If were I B. I were C. Were I D. Was I

4). My suggestion is that she ________ more exercise, which will do a lot of

good to her. A. takes B. must take C. take D. took

省略虚拟条件

省略连词if

有时可将条件从句的连词if省略，但此时应用倒装句型，即把从句中的were,should,had 等提到句首：

Were I Tom,I would refuse. 如果我是汤姆，我会拒绝。

Should it be necessary,I would go. 假若有必要，我会去的。

Had it not been for the bad weather we would have arrived on time. 若不是天气坏，我们就准时到达了。

【注】

① 若条件从句为否定句，否定词not应置于主语之后，而不能与were,should,had 等缩略成Weren't,Shouldn't,Hadn't而置于句首。

② 有时省略if后提前的had不是助动词：

Had I time,I would come. 假若我有时间，我会来的。(=If I had time...)省略主语和动词be