English verb conjugation
CAN CLASS

Regular verb: class - classed - classed

Affirmation

Simple form	V-ing form
I can class you can class she can class we can class you can class they can class	I can be classing you can be classing she can be classing we can be classing you can be classing they can be classing
Perfect	V-ing perfect
I can have classed you can have classed she can have classed we can have classed you can have classed they can have classed	I can have been classing you can have been classing she can have been classing we can have been classing you can have been classing they can have been classing

Negation

Simple form	V-ing form
I cannot class you cannot class she cannot class we cannot class you cannot class they cannot class	I cannot be classing you cannot be classing she cannot be classing we cannot be classing you cannot be classing they cannot be classing
Perfect	V-ing perfect
I cannot have classed you cannot have classed she cannot have classed we cannot have classed you cannot have classed they cannot have classed	I cannot have been classing you cannot have been classing she cannot have been classing we cannot have been classing you cannot have been classing they cannot have been classing

Interrogative form

Simple form	V-ing form
can I class? can you class? can she class? can we class? can you class? can they class?	can I be classing? can you be classing? can she be classing? can we be classing? can you be classing? can they be classing?
Perfect	V-ing perfect
can I have classed? can you have classed? can she have classed? can we have classed? can you have classed? can they have classed?	can I have been classing? can you have been classing? can she have been classing? can we have been classing? can you have been classing? can they have been classing?

Interro-negative form

Simple form	V-ing form
can I not class? can you not class? can she not class? can we not class? can you not class? can they not class?	can I not be classing? can you not be classing? can she not be classing? can we not be classing? can you not be classing? can they not be classing?
Perfect	V-ing perfect
can I not have classed? can you not have classed? can she not have classed? can we not have classed? can you not have classed? can they not have classed?	can I not have been classing? can you not have been classing? can she not have been classing? can we not have been classing? can you not have been classing? can they not have been classing?