Question

这句话为什么不用was而用were??

"were you in the libray yestreday".
还有"If i were you....."
什么时候才用was??

Answer 1

第一句是因为主语是you

第二句是因为虚拟语气
虚拟语气中的Be动词全部要用were

翻译为:如果我是你
我不可能是你,所以用虚拟语气

Answer 2

虚拟语气里一般没有was(具体的说一切动词都是过去式) 虚拟语气它表示不太可能实现的事 比如说我希望我能飞就是I wish I could fly.

Answer 3

were you in the libray yestreday".
= If you were in the libray yestreday
1。如果省略if 必须用倒装句
2。虚拟语气，动词be 所有人称都用were

Answer 4

都是虚拟语气，was要变成were的
表示虚拟的时候不用was的，例如he were,you were，i were
而不用he was

Answer 5

虚拟语气,was要用were代替