English verb conjugation
COULD COOK

Regular verb: cook - cooked - cooked

Affirmation

Simple form	V-ing form
I could cook you could cook he could cook we could cook you could cook they could cook	I could be cooking you could be cooking he could be cooking we could be cooking you could be cooking they could be cooking
Perfect	V-ing perfect
I could have cooked you could have cooked he could have cooked we could have cooked you could have cooked they could have cooked	I could have been cooking you could have been cooking he could have been cooking we could have been cooking you could have been cooking they could have been cooking

Negation

Simple form	V-ing form
I couldn't cook you couldn't cook he couldn't cook we couldn't cook you couldn't cook they couldn't cook	I couldn't be cooking you couldn't be cooking he couldn't be cooking we couldn't be cooking you couldn't be cooking they couldn't be cooking
Perfect	V-ing perfect
I couldn't have cooked you couldn't have cooked he couldn't have cooked we couldn't have cooked you couldn't have cooked they couldn't have cooked	I couldn't have been cooking you couldn't have been cooking he couldn't have been cooking we couldn't have been cooking you couldn't have been cooking they couldn't have been cooking

Interrogative form

Simple form	V-ing form
could I cook? could you cook? could he cook? could we cook? could you cook? could they cook?	could I be cooking? could you be cooking? could he be cooking? could we be cooking? could you be cooking? could they be cooking?
Perfect	V-ing perfect
could I have cooked? could you have cooked? could he have cooked? could we have cooked? could you have cooked? could they have cooked?	could I have been cooking? could you have been cooking? could he have been cooking? could we have been cooking? could you have been cooking? could they have been cooking?

Interro-negative form

Simple form	V-ing form
couldn't I cook? couldn't you cook? couldn't he cook? couldn't we cook? couldn't you cook? couldn't they cook?	couldn't I be cooking? couldn't you be cooking? couldn't he be cooking? couldn't we be cooking? couldn't you be cooking? couldn't they be cooking?
Perfect	V-ing perfect
couldn't I have cooked? couldn't you have cooked? couldn't he have cooked? couldn't we have cooked? couldn't you have cooked? couldn't they have cooked?	couldn't I have been cooking? couldn't you have been cooking? couldn't he have been cooking? couldn't we have been cooking? couldn't you have been cooking? couldn't they have been cooking?