I [sit] on a mountain.
I sat on a mountain.
He [sleep] in the garden.
He slept in the garden.
They [swim] in the ocean.
They swam in the ocean.
She [play] tennis.
She played tennis.
He [tell] a funny story.
He told a funny story.
She [win] the race.
She won the race.
I [write] a letter.
I wrote a letter.
