Collocations for participate - verb

fully
actively
Local residents actively participated in the decision-making process.

directly, personally
effectively, meaningfully
We teach students how to participate effectively in our society.

frequently, regularly
voluntarily, willingly
Twenty-four subjects voluntarily participated in the study.

eagerly, enthusiastically
The women participated enthusiastically in literacy classes.

equally

be able to, have the opportunity to
be allowed to, be encouraged to, be invited to
Other countries were invited to participate in the project.

agree to
refuse to

in
They will have the opportunity to participate actively in the process.

Participate is used with these nouns as the subject:
country, volunteer