Formulas For the Simple Past Tense AND example

*Aff.Structure:
Subject + Verb(-ed / irregular) + Complement + .
1.Sergio Forgot  to save the milk in the fridge.

*Neg.Structure:

Subject + didn't+Verb(base part) + Complement + .

2.Sergio didn't forget to save the milk in the fridge.

*Int.Structure:

-IF? (yes or no)

Did+Subject +Verb(base part) + Complement + ?

3.Did Sergio forget to save the juice in the fridge?  -No,he didn't.

-WH?

 Wh+did + Subject + Verb(base part) + Complement + ?

4.Where did Sergio forget to save the milk? -In the fridge.