Is “Didn’t you went to kindergarten?” correct? Does is have bad grammar?

How does kennedy’s word choice affect the tone and meaning of this excerpt from the passage? while the wall is the most obvious and vivid demonstration of the failures of the communist system, for all the world to see, we take no satisfaction in it, for it is, as your mayor has said, an offense not only against history but an offense against humanity, separating families, dividing husbands and wives and brothers and sisters, and dividing a people who wish to be joined together.

Iopened the door quietly,then stood in the doorway rewrite using ..ing participle

It was a bitter cold saturday morning ,the young track star dressed for his daily five mile run