He is very Fervent about his religion.
The man was fervent about basketball, because he went to every game of his favorite team.
The boy was fervent about his girlfriend because he loved her so much! -Justme4life <3
(The words may be part of separate clauses, or the letter I could specifically refer to the letter of the alphabet. Otherwise, the proper conjugation is "am.")Examples:The one that I like the best is...