Have participated is it right grammar?

"Participated" is a past tense verb, so it's grammatically correct. However, it's usually used in a sentence with "have" as part of the present perfect tense.

Here are some examples:

* "I have participated in many community events."

* "They have participated in the research project."

If you are using it without "have" in front of it, it would need to be part of a different sentence structure. For example:

* "They participated in the meeting."

Let me know if you have a specific sentence in mind and I can help you with the grammar!