When making a question using the simple past, you will have to use did just as you learned to use do with the simple present tense.

SIMPLE PRESENT

Statement:
–They accept credit cards.
Question:
–Do they accept credit cards?

SIMPLE PAST

Statement:
–They accepted credit cards last year.
Question:
–Did they accept credit cards last year?

When using did in a question, the main verb will be in the base form (the unconjugated form found in the dictionary), not the simple past tense.

NOTE: For a negative question in the past, use didn't.

–Didn't you get my letter?

–Didn't they come?

Examples of Questions in the Simple Past

• Did he go to America last year?
• Did they make a reservation?