帮我分析一下这句子的语法和意思The lessons would not have been possible were it not for the dedication of the local teaching staff这个句子倒装部分是哪里和为什么需要倒装？

如果不是当地教育人情员的奉献(献身)那么这个课程是不可能的
were在这被提前了
属虚拟语气的一种用法
wound也可提前

这个课程将不太可能因为本地师资行奉献之礼

没有当地教育工作者的奉献,这些课程不可能实现.
虚拟语气,强调,倒装
虚拟条件句的倒装
虚拟条件句的从句部分如果含有were,should,或had,可将if省略,再把were,should或had 移到从句句首,实行倒装.
Were they here now,they could help us.
=If they were here now,they could help us.
Had you come earlier,you would have met him
=If you had come earlier,you would have met him.
Should it rain,the crops would be saved.
=Were it to rain,the crops would be saved.
注意：
在正式英国英语和美国英语的虚拟语气的从句中,动词'be'的过去时态一律用"were",不用was,即在从句中be用were代替.在非正式英国英语中,was、were均可,但were较常用,而且更正式.在“If I were you"、"If I were in sb's position"、"If it were not for."中,were不可用was代替.
If I were you,I would go to look for him.
如果我是你,就会去找他.
If he were here,everything would be all right.
如果他在这儿,一切都会好的.
典型例题
_____ to do the work,I should do it some other day.
A.If were IB.I were C.Were I D.Was I
答案C.在虚拟条件状语中如果有were,should,had这三个词,通常将if省略,主语提前,变成 were,should,had +主语的形式.但要注意,在虚拟条件状语从句中,省略连词的倒装形式的句首不能用动词的缩略形式.如我们可说 Were I not to do.,而不能说 Weren't I to do.