'Can' and 'Be able to' are both used to speak about abilities, and the possibility of doing something. 'Can' and 'Be able to' are known as modal verbs in English.
Here are some examples of 'can' and 'be able to' used to speak about abilities.
Can for Abilities
She can play tennis.
They could speak English at a very young age.
Peter can type 100 words per minute.
They could speak English at a very young age.
Peter can type 100 words per minute.
Be Able to for Abilities
My sister is able to run a marathon.
The students were able to get an A on the test.
We will be able to attend the class next semester.
The students were able to get an A on the test.
We will be able to attend the class next semester.
Here are examples of the two forms to speak about possibilities.
Can for Possibilities
Can you come to the party next week?
Do you think he can help with my homework?
Peter told me he could pick you up at the airport.
Do you think he can help with my homework?
Peter told me he could pick you up at the airport.
Be Able to for Possibilities
We weren't able to get tickets to the concert.
She'll be able to study for the test tomorrow.
Jack won't be able to come for another three days.
She'll be able to study for the test tomorrow.
Jack won't be able to come for another three days.
Try this on line exercise. Click on the link below.
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