English verb conjugation
COULD FRANK

Regular verb: frank - franked - franked

Affirmation

Simple form	V-ing form
I could frank you could frank he could frank we could frank you could frank they could frank	I could be franking you could be franking he could be franking we could be franking you could be franking they could be franking
Perfect	V-ing perfect
I could have franked you could have franked he could have franked we could have franked you could have franked they could have franked	I could have been franking you could have been franking he could have been franking we could have been franking you could have been franking they could have been franking

Negation

Simple form	V-ing form
I could not frank you could not frank he could not frank we could not frank you could not frank they could not frank	I could not be franking you could not be franking he could not be franking we could not be franking you could not be franking they could not be franking
Perfect	V-ing perfect
I could not have franked you could not have franked he could not have franked we could not have franked you could not have franked they could not have franked	I could not have been franking you could not have been franking he could not have been franking we could not have been franking you could not have been franking they could not have been franking

Interrogative form

Simple form	V-ing form
could I frank? could you frank? could he frank? could we frank? could you frank? could they frank?	could I be franking? could you be franking? could he be franking? could we be franking? could you be franking? could they be franking?
Perfect	V-ing perfect
could I have franked? could you have franked? could he have franked? could we have franked? could you have franked? could they have franked?	could I have been franking? could you have been franking? could he have been franking? could we have been franking? could you have been franking? could they have been franking?

Interro-negative form

Simple form	V-ing form
could I not frank? could you not frank? could he not frank? could we not frank? could you not frank? could they not frank?	could I not be franking? could you not be franking? could he not be franking? could we not be franking? could you not be franking? could they not be franking?
Perfect	V-ing perfect
could I not have franked? could you not have franked? could he not have franked? could we not have franked? could you not have franked? could they not have franked?	could I not have been franking? could you not have been franking? could he not have been franking? could we not have been franking? could you not have been franking? could they not have been franking?