English verb conjugation
COULD QUAD

Regular verb: quad - quaded - quaded

Affirmation

Simple form	V-ing form
I could quad you could quad she could quad we could quad you could quad they could quad	I could be quading you could be quading she could be quading we could be quading you could be quading they could be quading
Perfect	V-ing perfect
I could have quaded you could have quaded she could have quaded we could have quaded you could have quaded they could have quaded	I could have been quading you could have been quading she could have been quading we could have been quading you could have been quading they could have been quading

Negation

Simple form	V-ing form
I couldn't quad you couldn't quad she couldn't quad we couldn't quad you couldn't quad they couldn't quad	I couldn't be quading you couldn't be quading she couldn't be quading we couldn't be quading you couldn't be quading they couldn't be quading
Perfect	V-ing perfect
I couldn't have quaded you couldn't have quaded she couldn't have quaded we couldn't have quaded you couldn't have quaded they couldn't have quaded	I couldn't have been quading you couldn't have been quading she couldn't have been quading we couldn't have been quading you couldn't have been quading they couldn't have been quading

Interrogative form

Simple form	V-ing form
could I quad? could you quad? could she quad? could we quad? could you quad? could they quad?	could I be quading? could you be quading? could she be quading? could we be quading? could you be quading? could they be quading?
Perfect	V-ing perfect
could I have quaded? could you have quaded? could she have quaded? could we have quaded? could you have quaded? could they have quaded?	could I have been quading? could you have been quading? could she have been quading? could we have been quading? could you have been quading? could they have been quading?

Interro-negative form

Simple form	V-ing form
couldn't I quad? couldn't you quad? couldn't she quad? couldn't we quad? couldn't you quad? couldn't they quad?	couldn't I be quading? couldn't you be quading? couldn't she be quading? couldn't we be quading? couldn't you be quading? couldn't they be quading?
Perfect	V-ing perfect
couldn't I have quaded? couldn't you have quaded? couldn't she have quaded? couldn't we have quaded? couldn't you have quaded? couldn't they have quaded?	couldn't I have been quading? couldn't you have been quading? couldn't she have been quading? couldn't we have been quading? couldn't you have been quading? couldn't they have been quading?