Some irregular past tense verbs change the vowel when going from present tense to past tense.
run – ran
give – gave
drink – drank
sing – sang
ring – rang
begin – began
swim – swam
Today I swim. Yesterday I swam in the lake.
I like to drink milk. Yesterday I drank soda.
I sing in the choir. Last year I sang with the orchestra.
We run laps around the track in gym class. We ran a race yesterday.
Certain verbs change the vowel to make past tense.
▶Now you try it. Change the verb in the first sentence to a past tense verb. Today I begin a new project. I _____ a different project last week. Did you figure it out? Good for you!