Question

求解释几道英语选择题~

1.—Tom,why didn’t you go skating with us yesterday?
—I____,but I had an unexpected visitor.
A.had B.would C.was going to D.did

2.I stopped and smiled when I was John in the street yesterday,but he ignored me and walked on as if I____.
A.hasn’t existed B.hadn’t existed C.didn’t exist D.wouldn’t exist

3.____the truth,he wouldn’t have offered her any help at all.
A.Should Tony know
B.Had Tony known
C.Were Tony to known
D.Has Tony known
参考答案是：CCB，请解释，万分感谢~

Answer 1

1. 回答的内容是yesterday的情况，所以用过去将来时，“过去打算做……”
2. 描述的情况是真实的，不需要用虚拟，当一般条件句时态处理。因整句用的是过去时，所以这里也用一般过去时。
3. 非真实虚拟条件句，与过去事实相反，同时省略if时，用倒装。

Answer 2

be going to正要做某事 由语境可知
首先一定是过去的时态排除AD 过去完成时表示过去的过去 语境里两个动作是同时的所以C
考察虚拟语气和倒装 D无此用法 C被动 不符 对过去虚拟 用过去完成时 选B