These factors are of great importance when it comes to the human behavior. (İnsan davranışları söz konusu olduğunda bu faktörlerin önemi çok büyüktür.).
When it comes to cars, I like GM. I would buy a Chev or a Pontiac.
... I love the boy that when he comes home from the dentist. ...
... when it comes to understanding the value of marketing or advertising ...