x8u31．but once_picked_up,_they tried to bite me.但是它们一被捡起来，就试图咬我。1once作为连接词引导时间状语从句时，后面可接现在分词或过去分词。①once opened, the museum will be very popular with the citizens.博物馆一旦开放，肯定会受到市民的欢迎。表被动②once talking with him, you"ll find him an easygoing man. 一旦与他交谈，你就会发现他是一个随和的人。表主动2once 引导的从句中，要用一般时代替将来时。①once you have grasped english, you"ll be easy to get a well－paid job.一旦你掌握了英语，你就会很容易找到一份报酬很高的工作。现在完成时代替将来完成
