There's many crowded in the park.
~> There's many people in the park.
~> The park is crowded.

New York is   very modern place.
~> New York is a very modern place.

These paper is historic.
~> These papers/documents are historical.

My uncle work in industrial ? .
~> My uncle works in an industrial company.

I saw   famous person Yesterday.
~> I saw a famous person yesterday.