题目内容：

what happened to the bird i gave you.The bird ____well,but I didn't take care of it.
A.would have grown B.might grow

优质解答

选A
如果是might的话就是从现在的角度推测将来了,而这里鸟已经出问题了,是从过去的角度推测相对于过去的将来.
这句话表达的意思换个说法就是,如果以前好好照顾鸟,它就可能会长得很好.但是我并没有这么做,有虚拟语气要用would