What happened to the patient?
had an accident
is visiting the hospital
went to visit a friend
is watching television
I'm not exactly sure what you're asking, but I'll try.
The answer is "compro" because it's past tense. I should know, I speak both Spanish and English.
Number 2
Hope it helps :))
Yo no estoy de pie.
Yo no estaré de pie.
Yo no estuve de pie.