English verb conjugation
CAN CLERK

Regular verb: clerk - clerked - clerked

Affirmation

Simple form	V-ing form
I can clerk you can clerk she can clerk we can clerk you can clerk they can clerk	I can be clerking you can be clerking she can be clerking we can be clerking you can be clerking they can be clerking
Perfect	V-ing perfect
I can have clerked you can have clerked she can have clerked we can have clerked you can have clerked they can have clerked	I can have been clerking you can have been clerking she can have been clerking we can have been clerking you can have been clerking they can have been clerking

Negation

Simple form	V-ing form
I can't clerk you can't clerk she can't clerk we can't clerk you can't clerk they can't clerk	I can't be clerking you can't be clerking she can't be clerking we can't be clerking you can't be clerking they can't be clerking
Perfect	V-ing perfect
I can't have clerked you can't have clerked she can't have clerked we can't have clerked you can't have clerked they can't have clerked	I can't have been clerking you can't have been clerking she can't have been clerking we can't have been clerking you can't have been clerking they can't have been clerking

Interrogative form

Simple form	V-ing form
can I clerk? can you clerk? can she clerk? can we clerk? can you clerk? can they clerk?	can I be clerking? can you be clerking? can she be clerking? can we be clerking? can you be clerking? can they be clerking?
Perfect	V-ing perfect
can I have clerked? can you have clerked? can she have clerked? can we have clerked? can you have clerked? can they have clerked?	can I have been clerking? can you have been clerking? can she have been clerking? can we have been clerking? can you have been clerking? can they have been clerking?

Interro-negative form

Simple form	V-ing form
can't I clerk? can't you clerk? can't she clerk? can't we clerk? can't you clerk? can't they clerk?	can't I be clerking? can't you be clerking? can't she be clerking? can't we be clerking? can't you be clerking? can't they be clerking?
Perfect	V-ing perfect
can't I have clerked? can't you have clerked? can't she have clerked? can't we have clerked? can't you have clerked? can't they have clerked?	can't I have been clerking? can't you have been clerking? can't she have been clerking? can't we have been clerking? can't you have been clerking? can't they have been clerking?