English verb conjugation
COULD BOW

Regular verb: bow - bowed - bowed

Affirmation

Simple form	V-ing form
I could bow you could bow she could bow we could bow you could bow they could bow	I could be bowing you could be bowing she could be bowing we could be bowing you could be bowing they could be bowing
Perfect	V-ing perfect
I could have bowed you could have bowed she could have bowed we could have bowed you could have bowed they could have bowed	I could have been bowing you could have been bowing she could have been bowing we could have been bowing you could have been bowing they could have been bowing

Negation

Simple form	V-ing form
I couldn't bow you couldn't bow she couldn't bow we couldn't bow you couldn't bow they couldn't bow	I couldn't be bowing you couldn't be bowing she couldn't be bowing we couldn't be bowing you couldn't be bowing they couldn't be bowing
Perfect	V-ing perfect
I couldn't have bowed you couldn't have bowed she couldn't have bowed we couldn't have bowed you couldn't have bowed they couldn't have bowed	I couldn't have been bowing you couldn't have been bowing she couldn't have been bowing we couldn't have been bowing you couldn't have been bowing they couldn't have been bowing

Interrogative form

Simple form	V-ing form
could I bow? could you bow? could she bow? could we bow? could you bow? could they bow?	could I be bowing? could you be bowing? could she be bowing? could we be bowing? could you be bowing? could they be bowing?
Perfect	V-ing perfect
could I have bowed? could you have bowed? could she have bowed? could we have bowed? could you have bowed? could they have bowed?	could I have been bowing? could you have been bowing? could she have been bowing? could we have been bowing? could you have been bowing? could they have been bowing?

Interro-negative form

Simple form	V-ing form
couldn't I bow? couldn't you bow? couldn't she bow? couldn't we bow? couldn't you bow? couldn't they bow?	couldn't I be bowing? couldn't you be bowing? couldn't she be bowing? couldn't we be bowing? couldn't you be bowing? couldn't they be bowing?
Perfect	V-ing perfect
couldn't I have bowed? couldn't you have bowed? couldn't she have bowed? couldn't we have bowed? couldn't you have bowed? couldn't they have bowed?	couldn't I have been bowing? couldn't you have been bowing? couldn't she have been bowing? couldn't we have been bowing? couldn't you have been bowing? couldn't they have been bowing?