Simple Past tense is used to describe actions that happened at an earlier time and have already completed, for example: 

She cleaned her house. Ella limpio su casa 

I broke the window.Yo rompi la ventana 

In the past simply did the auxiliary is

a positive manner in the form puts positova not use auxiliary. but the verb is put in the past.

You danced last week pop music.

negatively: Did not

in the negative if it puts the auxiliary did not, but the verb is  put into this because the auxiliary is already indicating that the sentence is in past.

Did not you dance pop music last week.

Interrogative form:

the auxiliary is placed first (did, Did not) that the pronoun (I, He, She, We, They, etc.) and the verb is put into this.

DID YOU dance pop music last week?