i didn't know you had called the police before l came here为什么是did_英语解答

i didn't know you had called the police before l came here
为什么是didn't而不是don't

人气：437 ℃　时间：2020-04-30 02:22:41

解答

中文“我不知道……”后面只要跟的是陈述一件事,就要说 I didn't know...,因为跟在后面的事你不知道是过去,现在一定知道才会说.例如：我不知道你已来了.I didn't know you are here.如果后面跟疑问句,表示现在仍不知...