but the next thing we knew it was morning 怎么分析

问题描述:

but the next thing we knew it was morning 怎么分析
高一英语必修一第三单元第四课

完整了吗?成分虽然完整的,但意思有点别扭
but是连词,the next thing主语,we knew it是个从句,前面省略了that,was谓语,morning宾语