状语从句中的虚拟语气
由as if 或as though引导的状语从句表示比较或方式时，从句中的谓语动词用虚拟语气。动词形式用动词的过去式(be→were)或had+过去分词。如：
The teacher treats the student as if he were her own child.这位老师带这位学生就象她的亲生孩子一样。
He speaks as if he had been to the Unite States.他说得好象他真的到过美国似的。
注意和陈述语气的区别：
He looks as if he is ill. 他看起来真的病了。
He looks as if he were ill. 他看起来病了（但肯定没病，装的）。
VI. 一些句型中的虚拟语气
在It is (high) time (that) …从句的谓语动词常用动词的过去式或should do表示虚拟语气，意思是“该干某事了，时间已经有些晚了”。如：
It is high time that we should go home.
It is time that we did something to stop pollution.该我们做些什么制止污染的时候了。
It is time that Father picked up Lily from the kindergarten.该父亲去幼儿园接莉莉的时候了。
I’d rather (that)…句型中，表示“我宁愿/希望”，表现在和将来用did/were，表过去用had done
I’d rather you hadn’t told me the truth.我真希望你告诉我真相。
I’d rather I didn’t see you again.我宁愿不再见着你。
If only…的虚拟结构，表感叹，“要是……就好了！”
If only+句子
对现在进行虚拟
动词的过去式 / were
2. 对将来进行虚拟
would +动词原形
3. 对过去进行虚拟
had +过去分词
例如：
If only he were here!
If only I had not been ill last week!
If only I had more money!
If only it would rain tomorrow!
VII. 祝愿句中的虚拟语气
用 “may+动词原形”表示祝愿，但愿，此时may须置于句首（多用于正式文体中）。如：
May good luck be yours!祝你好运！
May you be happy!祝你快乐！
May you do even better!祝你取得更大成就！用动词原形。例如：
Long live the people! 人民万岁！
“God bless you,” said the priest.牧师说：“愿上帝保佑你！”
