the supervisor could have prevented the accident

the supervisor could have prevented the accident supervisor of the electronic detartment麻烦名位问一下, only when the war was over was he able to get back to work?其中为什么会有was,这是什么语法?类似的还有：the supervisor could have prevented the accident had he known it beforehand.这里为什么会出现had? What are some of the things your supervisor did that you disliked? 再请问一下,是弱电部门的主管吗supervisor of the electronic detartment A is the Rep. of General Supervisor of XXX Bridge Upper Part.怎么翻译? supervisor,deputy supervisor,acting supervisor,还能按职位高低排个序, Change Supervisor Password是什么意思? Warehouse Supervisor是什么意思 SUPERVISOR的翻译 set supervisor password是什么意思? supervisor的意思是 supervisor-subordinateguanxi是什么意思 mechanical supervisor是什么意思 tooling supervisor是什么意思 training supervisor是什么意思 supervisor是什么职位 finance supervisor是什么意思