Odpowiedź :
1) I take part in this discussion.
2) I am taking part in this discussion.
3) I will take part in this discussion.
4) I took part in this discussion.
5) I have taken part in this discussion.
2) I am taking part in this discussion.
3) I will take part in this discussion.
4) I took part in this discussion.
5) I have taken part in this discussion.