can / can’t
Learners sometimes use the wrong form of the verb when they use can and to.
We use the infinitive without to after can.
[latex]\color{limegreen}{\checkmark}[/latex] He can play the piano.
✗ He can to play the piano.
We use to + infinitive after want and need.
[latex]\color{limegreen}{\checkmark}[/latex] They want to know the answer.
✗ They want know the answer.
Correct the mistakes in the sentences.