Yesterday I tried to schedule a doctor's appointment, but he ________ see me then.
Yesterday I tried to schedule a doctor's appointment, but he couldn't see me then.
She ___________ ride her bike right now, because there's too much traffic.
She can't ride her bike right now, because there's too much traffic.
My neighbor asked me to help him move, but I ______________ help.
My neighbor asked me to help him move, but I couldn't help.
When I was young I ____________ talk, but now I _________ .
When I was young, I couldn't talk, but now I can.
I ____________ go to the party last week, because I didn't have a ride.
I couldn't go to the party last week, because I didn't have a ride.
I _______ run five miles before my sprained ankle, but now I _________ .
I could run five miles before my sprained ankle, but now I can't.
I drank coffee for dinner and now I ________ sleep.
I drank coffee for dinner and now I can't sleep.
I went online, but I ___________ buy a ticket for the concert.
I went online, but I couldn't buy a ticket for the concert.
I don't feel tired, so I _________ drive now.
I don't feel tired, so I can drive now.
I ______ play because my homework is finished.
I can play because my homework is finished.