作业帮虚拟语气倒装在什么情况下发生
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虚拟语气倒装在什么情况下发生
虚拟语气倒装在什么情况下发生
虚拟语气倒装在什么情况下发生
虚拟语气式专门表达假设意义和其他非事实意义的动词形式,只有两种形式：Be－型虚拟式和Were－型虚拟式.
Be－型虚拟式：以动词原形表示,不管主语是什么人称,动词一律用原形.动词为被动态,助动词Be也是用原形,如IBe sent, you be sent ．
1.主要用于表示命令,决定,建议等词语之后的that－分句中.动词（decide,demand,insist,order, propose等）,形容词（appropriate,desirable, important,necessary等）名词形式（decision, demand, order, requirement等）.
He ordered that all the books be sent now.
It is essential that all work be examined.
Your advice that she wait till next week is reasonable.
2.用于由If,though,whatever,lest,so long as, whether等引导的分句中.表示揣测,让步,防备等.
Though everyone desert you, I will not．
3．用于某些公式化语句中.表示祝愿,诅咒,禁止等.
God bless／damn you．（神保佑你、该死的）
Heaven forbid 天理不容
so be it.但愿如此
were－型虚拟式只有一种形式,不管主语是什么人称,动词一律用were,I were, you were, he were．如动词为进行体或被动态,I were going , you were going, I were sent,he were sent．
1,用于某些状语分句中.由if, even if ,if only , even though,though引导的条件状语或让步状语分句中,表示非真实的条件或让步.
If i wer you, I should go ．
2．用于某些名词性分句中,由wish, would rather ,suppose, imagine等引导的that－分句中,表示一种臆想的（通常是不可能发生的）情况
I wish it were spring all the year．
if 从句中含有were, had ,should ， 可以把were, had ,should 提前，去掉if
比如if i were you, = were i you
if i had money = had i money
是方法也继续发给谁设备商的回去给我的八卦