Mr.Scott has sent a great many requests for spare parts and
3个回答

主干句是:Mr.Scott has sent requests

主语Mr.Scott ,谓语has sent,宾语requests

a great many 用来修饰requests,表示很多

for spare parts and other urgent messages也是修饰requests的.requests for……—— 一些对于……的请求要求.

Mr.Scott has sent (a great many )requests(for spare parts and other urgent messages)