Anonymous "You seem to can sing well" 'can', in the intended reading, has no infinitive, so there is no such thing as 'to can'. If you need the infinitive form, you have to use 'to be able to': You seem to be able to sing well. After 'seem' you may omit 'to be': You seem able to sing well.
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Anonymous"You seem to can sing well"'can', in the intended reading, has no infinitive, so there is no such thing as 'to can'. If you need the infinitive form, you have to use 'to be able to':
AnonymousWhere do we put word like "perhaps" in those sentences?"perhaps" usually goes at the beginning of a sentence.