How time flies!Three years (_)has passedhave passedis pastare past为什么

问题描述:

How time flies!Three years (_)
has passed
have passed
is past
are past
为什么

have passed

has passed (表示时间、距离、重量、金钱等作主语把它看作一个整体,谓语动词用单数,排除HAVE PASSED,ARE PAST ,而PAST 是介词,再加上时间过去,不用被动语态)