Can and be able to | Grammar worksheet

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Be able to often has the same meaning as can. In some cases, they are both possible.

Complete the following sentences using can or be able to.

1. I ----------------- read this.

a) can't
b) am unable to
c) Either could be used here

2. Some people --------------------- stand on their head.

a) can
b) are able to
c) Either could be used here

3. I am ---------------------- understand his motives.

a) can't
b) unable to
c) Either could be used here

4. -------------------- you play the piano?

a) Can
b) Are you able to
c) Either could be used here

5. One day human beings will -------------------- colonize Mars.

a) can
b) be able to
c) Either could be used here

6. What have you --------------------- find out?

a) been able to
b) could
c) can

7. She should ------------------- go.

a) be able to
b) can
c) could

8. I might ----------------- help.

a) be able to
b) can
c) could

Answers

1. I can't read this. / I am unable to read this.

2. Some people can stand on their head. / Some people are able to stand on their head.

3. I am unable to understand his motives.

4. Can you play the piano?

5. One day human beings will be able to colonize Mars.

6. What have you been able to find out?

7. She should be able to go.

8. I might be able to help.

See Also

Have or have got: differences
Hear or listen to?
He or she and they
Words ending in -man
At or in?
Can or could?
Go or get?
Can and be able to
Can and could
Care
Change
Change of tenses
Close and shut
Cloth and clothes
Come and go
Comparative and superlative
Comparatives - a common error
On the contrary
Cool down and cool off
Correct pronunciation of the
Correlatives
Could have + past participle

See Also

Back and Again
Bath and bathe
Beat and win
Because
Because of, due to, owing to and on account of
Been
Before
Before and in front of
Begin and Start
Belong to, belong on and belong in
Below and under
Beside
Besides
Between and among
Between and during
Between and from
Big, large and great
A bit
Born and borne
Both
Bring and take
But
But, though, in spite of, despite
By and with