Use the Simple Past to express the idea that an action started and finished at a specific time in the past. Sometimes, the speaker may not actually mention the specific time, but they do have one specific time in mind.
Examples:
I saw a movie yesterday.I didn't see a play yesterday.Last year, I traveled to Japan.Last year, I didn't travel to Korea.Did you have dinner last night?She washed her car.He didn't wash his car.
