Tennis (to play) on a court.
His father (to take) to hospital three days ago.
Gagarin (to fly) to space in 1961.
When she came in, the doctor (to examine) a patient.
She already (to meet) her friends today.
They are tired because they (to practice) tennis for a long time.

Tennis is played on a court.

His father was taken to hospital three days ago.

Gagarin flew to space in 1961.

When she came in, the doctor was examining a patient.

She has already met her friends today.

They are tired because they had been practicing tennis for a long time.