The formulas were part of the performance to allow the audience a moment to breathe while the singer could think about the next part of the story. These formulas for different aspects of culture such as greeting guests, eating meals, etc.
In lines 29-34 Shylock gives his reason.
"Yes, to smell pork; to eat of the habitation which your prophet, the Nazarrite, conjured the devil onto! I will buy with you, sell with you talk with you, walk with you and so following; but I will not eat with you, nor pray with you."
Shylock's reasons are to do with his own religious beliefs.
5--all of the other sentences are details relating to this main point.
She is on the First Part of the Research Process. She is Identifying what she wants to do and developing the idea.
True, I forget why but it’s true
