The phrase "actually participates" is correct and usable in written English.
It can be used to indicate that someone is actively involved in an activity or event, often in contrast to merely being present or observing.
Example: "In the project, she not only attends the meetings but actually participates in the discussions and decision-making processes."
Alternatives: "actively engages" or "takes part".
The experimental results suggest that FEC actually participates in the formation process of the SEI films on the surface of the electrode.
The Public Utilities Board actually participates in tenders with private companies, providing technical expertise and support in areas like operations and maintenance.
The C.I.A. urged him to change a scene in which Maya, the intrepid heroine, actually participates in what it delicately calls a "dosing technique" (simulated drowning, which has been classified as torture since the 1500's) because those kinds of officers didn't actually lay their hands on torture victims.
Indeed, it'll be a while yet before Lloyds actually participates in the program.
Whether the account holder or spouse actually participates in the other plan is irrelevant; eligibility for the plan alone will disqualify them from health savings account participation.
Of course, not every eligible voter actually participates on Election Day.
Also, exposure to the study appeared to increase willingness to participate, since many men who initially could see obstacles to participation, actually participated in the epidemiological questionnaire survey.
Interventions aimed at specific subgroups may encourage potential participants to actually participate.
Unlike Twitter, not everyone can actually participate in a conversation; instead, a current participant must grant access.
I actually participated in the revolt of '65, not as an onlooker but as a participant.
Work participation was operationalised as the time the individuals were likely to have actually participated in gainful employment.
