"supportive of the project" is correct and usable in written English.
You can use this phrase to describe an action or attitude that is favorable to the project. For example, "John's words were very supportive of the project and his enthusiasm was contagious."
Why are politicians who were initially against promoting Portuguese influences now supportive of the project?
Channel 4 were very supportive of the project from the very beginning.
Derek Jeter was supportive of the project as soon as he was briefed on it.
The Thai government, for its part, is highly supportive of the project.
It is understood that several of his tutors had been supportive of the project, which was initially labelled Brick.
The reason the Nazis were so supportive of the project is they wanted them to be fierce and aggressive.
The existing differences between the educational programmes, the teaching methods, and the supportive activities of the Project have upset the students of the ordinary schools and/or Literacy Movement classes, their families, and the staff of those educational units.
The Israeli prime minister, Binyamin Netanyahu, leads a rightwing cabinet that is largely supportive of the settlement project.
"The Port Authority has been supportive of the Hartz project, but it must also ensure the economic viability of the airport and most importantly public safety," said Mr. Ward.
The N.H.L. and the Islanders' two most bitter rivals, the New York Rangers and the New Jersey Devils, have been publicly supportive of the arena project on Long Island.
So the challenge for the European leaders who gather in Berlin this weekend, and for those of us generally supportive of the European project, is this: how do we influence this complex, volatile condition of 500 million minds?
