英语里need这个单词与develop一起用时，need是被发展还是need主动发展？

Question

though it wasn't until the Industrial Revolution,when a tremendous need for metals of all kinds developed,that Manham expanded to become one of the busiest ports in the country.请问1.when a tremendous need for metals of all kinds developed这里的developed是过去分词做定语修饰need表被动，need被develop，还是分词做定语修饰need表完成need had developed？还是developed是谓语动词一般过去时？

Answer 1

though it wasn't until the Industrial Revolution,when a tremendous need for metals of all kinds developed, that Manham expanded to become one of the busiest ports in the country.
这是一个though引导的状语从句。
主要结构：it wasn't until ... that...（强调until从句）
when引导定语从句，修饰the Industrial Revolution
when从句主语...need...谓语developed(过去式）
译文：
……虽然直到工业革命，这个时候各种金属的巨大需求发展起来，Manham才发展成为全国最繁忙的港口之一。追问

请问老师 need 应该是被发展才对啊 需求被人发展这才符合逻辑，可是如果按您这么解释，developed在这里是从句的谓语，那就成了需求主动发展了，需求是一个抽象的东西，它怎么可以主动发展呢？

追答

develop也可以作不及物动词的。

It's hard to say at this stage how the market will develop.
在现阶段很难说市场会如何发展。