16.—Where is Tom?—Well,he___you____here.Otherwise he would come down right now.

16.—Where is Tom?—Well,he___you____here.Otherwise he would come down right now.

题目
16.—Where is Tom?—Well,he___you____here.Otherwise he would come down right now.
为什么答案不是has't known,are?
答案
答案是 hadn't known were
这个是描述的过去的事情,是说他过去不知道,所以用hadn't 和were.并且后面用了虚拟语气:“否则他就来了.” 用了would 表示虚拟语气.
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