A past tense verb tells action that happened anytime before right now. Regular past tense verbs add an -ed ending.
Look at these sentences.
The first sentence has a present tense verb. The second sentence changes the verb to past tense.
Today I work. Yesterday I worked.
Today I play my violin. Yesterday I played my violin.
Today Mary bakes a cake. Yesterday Mary baked a cake.
Today John and Ralph jump on the trampoline. Yesterday John and Ralph jumped on the trampoline.
A regular verb adds an -ed ending when changing from present tense to past tense.
▶It’s your turn. Change the present tense verb to a past tense verb. Today I walk to school. Yesterday I ____ to school. Did you figure it out? Good for you!