Present Tense:
* I walk to school every day.
* She cooks dinner for her family.
* They laugh at the funny joke.
* We play basketball in the park.
Past Tense:
* I walked to school yesterday.
* She cooked dinner last night.
* They laughed at the movie.
* We played basketball this morning.
Present Participle:
* I am walking to the store.
* She is cooking dinner.
* They are laughing at the joke.
* We are playing basketball.
Past Participle:
* I have walked to school many times.
* She has cooked dinner for us before.
* They have laughed at that joke many times.
* We have played basketball in this park before.
Note: Regular verbs form their past tense and past participle by adding -ed or -d to the base form.