some of them,like the cameras,was lost by astronauts when they did work outside their spaceship
问题描述：
some of them,like the cameras,was lost by astronauts when they did work outside their spaceship
为什么不是lost 不是非谓语吗
答
这是被动式 被丢弃不是非谓语吗不是啊，是谓语，后面的did不是也是谓语吗那是when引导的时间状语从句，主句是some of them was lost by astronauts是不是从句的谓语和主句的谓语是无关的。主句和从句都要分别有谓语？是的。根据不同的情况选择谓语