English verb conjugation
COULD QUAD

Regular verb: quad - quaded - quaded

Affirmation

Simple form	V-ing form
I could quad you could quad he could quad we could quad you could quad they could quad	I could be quading you could be quading he 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 he 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 he 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 he 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 he 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 he 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 he 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 he quad? could we quad? could you quad? could they quad?	could I be quading? could you be quading? could he 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 he 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 he 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 he 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 he 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 he 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 he have been quading? couldn't we have been quading? couldn't you have been quading? couldn't they have been quading?