Collocations for supportive - adj.

be, seem
become
remain
find sb

extremely, fairly, very, etc.
highly, incredibly, strongly, wonderfully
strongly supportive of the government's approach
All the hospital staff were wonderfully supportive.

entirely, fully, totally, wholly
We are totally supportive of this idea.

broadly (esp. BrE), generally, largely
mutually
They have established a mutually supportive and caring relationship.

of
fully supportive of the changes

to
They were all extremely supportive to me.

Supportive is used with these nouns:
environment, family, network, parent, wife