English verb conjugation
CAN MARK MARK

Regular verb: mark mark - mark marked - mark marked

Warning, this verb may not exist. Conjugation is given as example.

Affirmation

Simple form	V-ing form
I can mark mark you can mark mark she can mark mark we can mark mark you can mark mark they can mark mark	I can be mark marking you can be mark marking she can be mark marking we can be mark marking you can be mark marking they can be mark marking
Perfect	V-ing perfect
I can have mark marked you can have mark marked she can have mark marked we can have mark marked you can have mark marked they can have mark marked	I can have been mark marking you can have been mark marking she can have been mark marking we can have been mark marking you can have been mark marking they can have been mark marking

Negation

Simple form	V-ing form
I cannot mark mark you cannot mark mark she cannot mark mark we cannot mark mark you cannot mark mark they cannot mark mark	I cannot be mark marking you cannot be mark marking she cannot be mark marking we cannot be mark marking you cannot be mark marking they cannot be mark marking
Perfect	V-ing perfect
I cannot have mark marked you cannot have mark marked she cannot have mark marked we cannot have mark marked you cannot have mark marked they cannot have mark marked	I cannot have been mark marking you cannot have been mark marking she cannot have been mark marking we cannot have been mark marking you cannot have been mark marking they cannot have been mark marking

Interrogative form

Simple form	V-ing form
can I mark mark? can you mark mark? can she mark mark? can we mark mark? can you mark mark? can they mark mark?	can I be mark marking? can you be mark marking? can she be mark marking? can we be mark marking? can you be mark marking? can they be mark marking?
Perfect	V-ing perfect
can I have mark marked? can you have mark marked? can she have mark marked? can we have mark marked? can you have mark marked? can they have mark marked?	can I have been mark marking? can you have been mark marking? can she have been mark marking? can we have been mark marking? can you have been mark marking? can they have been mark marking?

Interro-negative form

Simple form	V-ing form
can I not mark mark? can you not mark mark? can she not mark mark? can we not mark mark? can you not mark mark? can they not mark mark?	can I not be mark marking? can you not be mark marking? can she not be mark marking? can we not be mark marking? can you not be mark marking? can they not be mark marking?
Perfect	V-ing perfect
can I not have mark marked? can you not have mark marked? can she not have mark marked? can we not have mark marked? can you not have mark marked? can they not have mark marked?	can I not have been mark marking? can you not have been mark marking? can she not have been mark marking? can we not have been mark marking? can you not have been mark marking? can they not have been mark marking?