Actions that have already taken place in the past.
Add 'd' or 'ed' to regular verbs.
Examples of regular verbs in simple past tense that are formed by adding 'd' or 'ed'
Teacher talked loudly in class last week.
talk ---> talked
She combed her hair just now.
comb ---> combed
They watched the movie last night.
watch ---> watched
Examples of irregular verbs, which are not formed by adding 'd' or 'ed'
Jenny ate a biscuit just now.
eat ---> ate
This morning, my mother drank a glass of orange juice.
drink ---> drank
My father gave me a storybook.
give ---> gave
Ali told teacher on what had happened just now.
tell ---> told