我想了很久的英语

I have been thinking for a long while now, perhaps I should get a change in the way I live.

I have thought it through./.I have been wondering about it for a long time.

爸爸，你知道。我想了好久那个圣经是留著长头发，摩西是留著长头发，诺亚是留著长头发，和恰好耶苏也是留著长头发。You know, Dad, I've been thinking about that. Samson had long hair, Moses had long hair, Noah had long hair, and even Jesus had long hair.所以想了很久可以用I've been thinking about that.

how to explain this word in english, i thought it for a long time.