? Suffice it to say that the open policy will remain
unchanged. (只需说什么就够了)
Home is home ,be it ever so homely.
were----型虚拟式
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2.用于某些名词性分句中
常用于wish,would rather,suppose,imagine之后的
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the ambassador will stay there if necessary .
the ambassador will stay there if need be . 精品课件
. It suffices to say that the open policy will remain unchanged.
b)I would rather/sooner(that)you/he/精t品课h件ey...
I’d rather he told me the truth.
c)if only ...
If only I knew her address.
d)he behaves as if /as though...
I prefer Mary to type the letters. I prefer that Mary type the letters.
b.用在advisable，appropriate，desirable，es精s品e课n件tial， obligatory，proper,imperative等形容词之后that分句中。
在这一用法中be-型虚拟式能与should+不 定式，to-不定式交替使用。
He order that the books be sent at once
=He order that the books should be sent at 精品课件 once
=He order that the books to be sent at once
They are staring at me as if I was /crazy.
在as if /as though结构中的动词形式通常决定说话人 的意图。比较：
I feel as if I was /were going to faint.(我感觉我好像 要晕倒了)
I feel as if I am going to faint.(我感觉我（真精的品课）件要晕 倒了)
用于某些公式化语句中
Be-型虚拟式用于某些公式化语句中可表示祝愿、诅咒、禁 止的意思。
Long live the people’s Republic of China！ Far be it from me(我极不愿) to spoil the fun 。
He will remain here if need be . 中修改句子
Were I to do it,I should rely on you. He is my best friend,my second self ,as it were . （好像，宛如）
假设表示法综述
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1.用动词的过去形式表示假设意义
a)It is time （that）...
It is time we went to bed.
用于由if，though，whatever，lest，so long as等 引导的分句中表示推测、让步、防备等含义。
If he be found guilty ,John shall have the right of appeal .
上述用法现在只适用于正式书面语体，在非正式语体中通常 用动词陈述式或者用should或may+不定式。如：
虚拟式
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虚拟式
用于表示命令、决定、建议、等词 语后的that分句中
be----型虚拟式用于由if，though，whatever，
lest，so long as等引导的分句中
用于某些公式化语句中
用于某些状语分句中
were----型虚拟式
用于某些名词性分句中
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1.用动词的过去形式表示假设意义
If the rumor be true，everything is possible。精品课件 If the rumor is true，everything is possible。
Whatever be his defense,we cannot tolerate this disloyalty. Whatever his defense may be,we cannot tolerate this disloyalty.
It is essential the all the facts be examined first.
c .用在decision，decree，demand，instruction， resolution等名词后的that 分句中。
The board has given instructions that the agent fly to Boston.
可能发
Suppose the earth were flat。
在第一、三人称单数主语后可为was 所取代
If it was to rain，the game would be put off. 精品课件
但是，在If I were you 这一分句中，通常倾向用 were，而不用was。在某些倒装句中只用were。
假设表示法综述
2.用情态动词过去式表示假设意义
be----型虚拟式
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用于表示命令、决定、建议、等词语后的that分句中
a .用在,demand,suggest， decide，prefer，vote等动词 后that分句中。
Conggress has decided/voted that the present law be maintained.
这就是说，在某些语境中，如果不表示假设意义，就不 必用过去式形式。如： The apple tatses as if it is sour.