I (walk) to school when it started to rain.
was walking (Past Continuous)
He (study) for three hours before he went to bed.
had been studying (Past perfect continuous)
When I left work, I saw that somebody (steal) my car.
had stolen (Past Perfect)
I (play) football every weekend.
play (Present Simple)
Lisa (go) to the supermarket yesterday.
went (Past Simple)
Toby (eat) all the cookies and none is left for you to eat.
has eaten (Present Perfect)
My sister (cook) dinner now.
is cooking (Present Continuous)
He (study) in the library for three hours.
has been studying (Present perfect continuous)