Why is 很多 sometimes before the noun and sometimes after the noun?
社区的休闲活动很多 is a [topic]+[comment] sentence


[社区的休闲活动] is the [topic]


[很多] is the [comment]


[社区的休闲活动][很多] = Community recreational activities are plenty

&quot;很多社区的休闲活动&quot; = &quot;Many community recreational activities&quot; (it is an incomplete sentence)

政府資助很多社区的休闲活动 = The government subsidizes recreational activities in many communities


It is a [svo] sentence. The adjective '很多' (many) is directly placed before the noun phrase 区的休闲活动 to modify it.

More example:
公園(是)很大的 = Parks are big - [Topic: 公園 + comment: (是)很大的]
很大的公園 = A big park [SVO]
公園很大 = (this) park is big - [Topic: (this) 公園 + comment: 很大]