Is it true a regular verb ends with -ed, -d, or -t to the present part

No, this is false because an example of a present tense verb would be jump or turn. Past tense would be jumped or turned. So, this statement is not true because -ed, -d, and -t would be past not present part.

- "there are several movements that doris lessing was associated with. first of all, communism. she pursued her communist beliefs and included them in her writing, and was also a member of several communist book clubs. she is also strongly associated with feminism, her fight for equality and women's rights.

doris lessing is the kind of writer who has followers, not just readers. they have been engaged to her chiefly because of her involvement in major problems, such as politics and woman-ism."