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.
I drank coffee for dinner and now I ________ sleep.
I drank coffee for dinner and now I can't sleep.
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.
I ______ play because my homework is finished.
I can play because my homework is finished.
I don't feel tired, so I _________ drive now.
I don't feel tired, so I can drive now.
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.
My neighbor asked me to help him move, but I ______________ help.
My neighbor asked me to help him move, but I couldn't help.
I went online, but I ___________ buy a ticket for the concert.
I went online, but I couldn't buy a ticket for the concert.
When I was young I ____________ talk, but now I _________ .
When I was young, I couldn't talk, but now I can.