CAN / BE ABLE TO
I'm not available tomorrow but I ______ (meet) next Monday.
I'm not available tomorrow but I CAN meet next Monday.
Adriana and her mother _____ the door because it was locked.
Adriana and her mother COULDN'T the door because it was locked.
As his leg was in plaster, John ______ (walk) for the next couple weeks.
As his leg was in plaster, John WASN'T ABLE TO / WAS UNABLE TO (walk) for the next couple weeks.
Frank ________ any Spanish when he got a job offer from a company in Spain.
Frank COULDN'T SPEAK any Spanish when he got a job offer from a company in Spain.
Scientists _____ (find) any signals from any form of intelligent life in space.
Scientists CAN'T FIND any signals from any form of intelligent life in space.
People ______ choose their opponents. The teams will be matched randomly.
People CAN'T choose their opponents. The teams will be matched randomly.
Our team ____ (win) the cup six times in twenty years.
Our team HAS BEEN ABLE TO WIN the cup six times in twenty years.
Bijan says he _______ four languages but he ______ to customers yesterday as he was a bit nervous.
Bijan says he CAN SPEAK four languages but he COULDN'T SPEAK/TALK to customers yesterday as he was a bit nervous.
Since the teenagers were partying very loudly, they _____ (hear) the doorbell when it rang.
Since the teenagers were partying very loudly, they WERE UNABLE TO HEAR / WEREN'T ABLE TO HEAR the doorbell when it rang.
Mike was the only one who _______ understand me, but now he ______ either.
Mike was the only one who COULD understand me, but now he CAN'T either.