1.i would have come earlier ,but i ___that you were waiting.
t know t known C,wouldnt know Dhavent known
she found it ,she ____it
d have sent ld send
rather that you ___right away
e ld leave leave
was a pity that he ____so careless.
ld be D
1.A 本句是虚拟语气和真实语气的混合,逗号前面那句是虚拟语气,后面那句是真实语气,所以选一般过去时。句意:(我要是早知道你在这等我,)我就来早一些了,但是我并不知道你一直在等我。事实上我并没有来早,但是不知道你在等我是真实的。
2.A 逗号前那句其实是if从句,用的'是倒装结构,也可以是if she had found it
本句是对过去情况的虚拟,从句用过去完成时,主句用would+have done
3.A would rather 句后用动词原形表示虚拟
4.D it在这里是形式主语,真正的主语是后面的that从句,这也是虚拟语气的一个句型,但是要用过去式表示虚拟,并且be动词一律用were。还有行为动词的比如:Its time you went to bed.