English verb conjugation
COULD DENATURE

Regular verb: denature - denatured - denatured

Affirmation

Simple form	V-ing form
I could denature you could denature he could denature we could denature you could denature they could denature	I could be denaturing you could be denaturing he could be denaturing we could be denaturing you could be denaturing they could be denaturing
Perfect	V-ing perfect
I could have denatured you could have denatured he could have denatured we could have denatured you could have denatured they could have denatured	I could have been denaturing you could have been denaturing he could have been denaturing we could have been denaturing you could have been denaturing they could have been denaturing

Negation

Simple form	V-ing form
I couldn't denature you couldn't denature he couldn't denature we couldn't denature you couldn't denature they couldn't denature	I couldn't be denaturing you couldn't be denaturing he couldn't be denaturing we couldn't be denaturing you couldn't be denaturing they couldn't be denaturing
Perfect	V-ing perfect
I couldn't have denatured you couldn't have denatured he couldn't have denatured we couldn't have denatured you couldn't have denatured they couldn't have denatured	I couldn't have been denaturing you couldn't have been denaturing he couldn't have been denaturing we couldn't have been denaturing you couldn't have been denaturing they couldn't have been denaturing

Interrogative form

Simple form	V-ing form
could I denature? could you denature? could he denature? could we denature? could you denature? could they denature?	could I be denaturing? could you be denaturing? could he be denaturing? could we be denaturing? could you be denaturing? could they be denaturing?
Perfect	V-ing perfect
could I have denatured? could you have denatured? could he have denatured? could we have denatured? could you have denatured? could they have denatured?	could I have been denaturing? could you have been denaturing? could he have been denaturing? could we have been denaturing? could you have been denaturing? could they have been denaturing?

Interro-negative form

Simple form	V-ing form
couldn't I denature? couldn't you denature? couldn't he denature? couldn't we denature? couldn't you denature? couldn't they denature?	couldn't I be denaturing? couldn't you be denaturing? couldn't he be denaturing? couldn't we be denaturing? couldn't you be denaturing? couldn't they be denaturing?
Perfect	V-ing perfect
couldn't I have denatured? couldn't you have denatured? couldn't he have denatured? couldn't we have denatured? couldn't you have denatured? couldn't they have denatured?	couldn't I have been denaturing? couldn't you have been denaturing? couldn't he have been denaturing? couldn't we have been denaturing? couldn't you have been denaturing? couldn't they have been denaturing?