English verb conjugation
COULD CLASS

Regular verb: class - classed - classed

Affirmation

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

Negation

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

Interrogative form

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

Interro-negative form

Simple form	V-ing form
couldn't I class? couldn't you class? couldn't she class? couldn't we class? couldn't you class? couldn't they class?	couldn't I be classing? couldn't you be classing? couldn't she be classing? couldn't we be classing? couldn't you be classing? couldn't they be classing?
Perfect	V-ing perfect
couldn't I have classed? couldn't you have classed? couldn't she have classed? couldn't we have classed? couldn't you have classed? couldn't they have classed?	couldn't I have been classing? couldn't you have been classing? couldn't she have been classing? couldn't we have been classing? couldn't you have been classing? couldn't they have been classing?