English verb conjugation
COULD DEFINE

Regular verb: define - defined - defined

Affirmation

Simple form	V-ing form
I could define you could define she could define we could define you could define they could define	I could be defining you could be defining she could be defining we could be defining you could be defining they could be defining
Perfect	V-ing perfect
I could have defined you could have defined she could have defined we could have defined you could have defined they could have defined	I could have been defining you could have been defining she could have been defining we could have been defining you could have been defining they could have been defining

Negation

Simple form	V-ing form
I couldn't define you couldn't define she couldn't define we couldn't define you couldn't define they couldn't define	I couldn't be defining you couldn't be defining she couldn't be defining we couldn't be defining you couldn't be defining they couldn't be defining
Perfect	V-ing perfect
I couldn't have defined you couldn't have defined she couldn't have defined we couldn't have defined you couldn't have defined they couldn't have defined	I couldn't have been defining you couldn't have been defining she couldn't have been defining we couldn't have been defining you couldn't have been defining they couldn't have been defining

Interrogative form

Simple form	V-ing form
could I define? could you define? could she define? could we define? could you define? could they define?	could I be defining? could you be defining? could she be defining? could we be defining? could you be defining? could they be defining?
Perfect	V-ing perfect
could I have defined? could you have defined? could she have defined? could we have defined? could you have defined? could they have defined?	could I have been defining? could you have been defining? could she have been defining? could we have been defining? could you have been defining? could they have been defining?

Interro-negative form

Simple form	V-ing form
couldn't I define? couldn't you define? couldn't she define? couldn't we define? couldn't you define? couldn't they define?	couldn't I be defining? couldn't you be defining? couldn't she be defining? couldn't we be defining? couldn't you be defining? couldn't they be defining?
Perfect	V-ing perfect
couldn't I have defined? couldn't you have defined? couldn't she have defined? couldn't we have defined? couldn't you have defined? couldn't they have defined?	couldn't I have been defining? couldn't you have been defining? couldn't she have been defining? couldn't we have been defining? couldn't you have been defining? couldn't they have been defining?