@tmorgan,
The verb that comes after can does not take to.
One reply stated that his means
The verb following 'can' must be in the 2nd person singular, not the infinitive 'to' form.
I still dont understand.
Can you give me an example of an incorrect sentence using the infinitive 'to' form.
Eg. Using one of the sentences in the 2nd person . He/She/it