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 couldn't frank you couldn't frank he couldn't frank we couldn't frank you couldn't frank they couldn't frank	I couldn't be franking you couldn't be franking he couldn't be franking we couldn't be franking you couldn't be franking they couldn't be franking
Perfect	V-ing perfect
I couldn't have franked you couldn't have franked he couldn't have franked we couldn't have franked you couldn't have franked they couldn't have franked	I couldn't have been franking you couldn't have been franking he couldn't have been franking we couldn't have been franking you couldn't have been franking they couldn't 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
couldn't I frank? couldn't you frank? couldn't he frank? couldn't we frank? couldn't you frank? couldn't they frank?	couldn't I be franking? couldn't you be franking? couldn't he be franking? couldn't we be franking? couldn't you be franking? couldn't they be franking?
Perfect	V-ing perfect
couldn't I have franked? couldn't you have franked? couldn't he have franked? couldn't we have franked? couldn't you have franked? couldn't they have franked?	couldn't I have been franking? couldn't you have been franking? couldn't he have been franking? couldn't we have been franking? couldn't you have been franking? couldn't they have been franking?