the police have caught some of the robbers since the robbery happened这句话什么意思
问题描述：
the police have caught some of the robbers since the robbery happened这句话什么意思
have为什么不能填are
答
意思是警察在劫案发生时已抓住了几个抢劫犯.
因为有since用现在完成时,have+done
祝你早日解决难题.