动词是cooperate，表示合作，协作的意思；形容词是cooperative，表示协作的意思，例如：
1.Are you going to cooperate or do we have to get physical?你是合作呢，还是要我们动手？
2.They had cooperated closely in the planning of the project.他们曾密切合作，共同规划这一项目。
3.The two groups agreed to cooperate with each other.这两个组同意相互协作。
