虚拟语气时be动词助动词提前表假设有哪几种?

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虚拟语气时be动词助动词提前表假设有哪几种?
虚拟语气时be动词助动词提前表假设有哪几种?

虚拟语气时be动词助动词提前表假设有哪几种?
1.在虚拟语气的从句谓语中出现 were,should,had 时,可以省略if,同时把这个词放到句首,形成倒装.
如：If I were you,I would not do that.= Were I you,...
If he had known you earlier,things would have been better.= Had I known you...
If you should call on her tomorrow,she would be happy.= Should you call on her...
2.还有一种由be引导的虚拟语气（相当于让步状语从句),在倒装结构中有时会碰到,be动词提前放到从句句首,形成倒装结构.
如：
I'll come as promised,be it rainy or fine.
不论雨天晴天,我都将如约到来.
Everybody must obey the rule,be he a teacher or a student.无论是老师还是学生,人人都必须遵守这个制度.

三种：
if+主语+had_____had+主语
if+主语+were_____were +主语
if+主语+should___should +主语

If it had not rained so hard yesterday we could have played tennis.→Had it not rained so hard yesterday, we could have played tennis. 另一种表达方式而已口语中很少用到（虚拟语气就是用来表示假设的）

虚拟语气时be动词助动词提前表假设有哪几种? 那有两个Be动词或情态动词或助动词改为一般疑问句时,是不是把第一个Be动词或情态动词或助动词提前虚拟语气的条件从句倒装的时候可以把助动词、情态动词、动词be/were提前,Had they tiem,they would certainly come and help us.它的原句是If they had time,they would certainly come and held us. 这里的would是虚拟语气的助动词还是情态动词?We would be glad to have you work with us. 虚拟语气动词选择关于as if 的虚拟语气as if 虚拟语气中的be 动词一定要用were 虚拟语气中be动词一定用were吗初三英语造句、、、带be动词的虚拟语气句子、、、虚拟语气与情态动词听说suppose用法相当于if,那是否suppose也是虚拟语气?如果suppose也是虚拟语气,那么语法也是比如现在相反假设 if + 过去时 ,主语+ would + 动词原型 Hurry up!恳请英语大神帮忙详细解释一下关于虚拟语气的一个疑问,跪谢!如题：虚拟语气中,与现在事实相反的假设（虚拟条件句）从句用：If +主语+动词的过去式（动词be用were)表示,主句用：主所有虚拟语气的be动词都要用were吗,还是只是虚拟条件状语从句才这样? 在虚拟语气中,对过去进行虚拟be动词可否用had been,而非were? 虚拟语气中it后面be动词是用was还是were? 虚拟语气里面要用到be动词的话是不是都要用were? 虚拟语气be动词问题为什么只能用were,写出理由请问：虚拟语气中什么时候be动词用were,什么时候用had been? 虚拟语气人称代词后be动词的形式一律都用were吗?