English verb conjugation
CAN TARNISH

Regular verb: tarnish - tarnished - tarnished

Affirmation

Simple form	V-ing form
I can tarnish you can tarnish he can tarnish we can tarnish you can tarnish they can tarnish	I can be tarnishing you can be tarnishing he can be tarnishing we can be tarnishing you can be tarnishing they can be tarnishing
Perfect	V-ing perfect
I can have tarnished you can have tarnished he can have tarnished we can have tarnished you can have tarnished they can have tarnished	I can have been tarnishing you can have been tarnishing he can have been tarnishing we can have been tarnishing you can have been tarnishing they can have been tarnishing

Negation

Simple form	V-ing form
I cannot tarnish you cannot tarnish he cannot tarnish we cannot tarnish you cannot tarnish they cannot tarnish	I cannot be tarnishing you cannot be tarnishing he cannot be tarnishing we cannot be tarnishing you cannot be tarnishing they cannot be tarnishing
Perfect	V-ing perfect
I cannot have tarnished you cannot have tarnished he cannot have tarnished we cannot have tarnished you cannot have tarnished they cannot have tarnished	I cannot have been tarnishing you cannot have been tarnishing he cannot have been tarnishing we cannot have been tarnishing you cannot have been tarnishing they cannot have been tarnishing

Interrogative form

Simple form	V-ing form
can I tarnish? can you tarnish? can he tarnish? can we tarnish? can you tarnish? can they tarnish?	can I be tarnishing? can you be tarnishing? can he be tarnishing? can we be tarnishing? can you be tarnishing? can they be tarnishing?
Perfect	V-ing perfect
can I have tarnished? can you have tarnished? can he have tarnished? can we have tarnished? can you have tarnished? can they have tarnished?	can I have been tarnishing? can you have been tarnishing? can he have been tarnishing? can we have been tarnishing? can you have been tarnishing? can they have been tarnishing?

Interro-negative form

Simple form	V-ing form
can I not tarnish? can you not tarnish? can he not tarnish? can we not tarnish? can you not tarnish? can they not tarnish?	can I not be tarnishing? can you not be tarnishing? can he not be tarnishing? can we not be tarnishing? can you not be tarnishing? can they not be tarnishing?
Perfect	V-ing perfect
can I not have tarnished? can you not have tarnished? can he not have tarnished? can we not have tarnished? can you not have tarnished? can they not have tarnished?	can I not have been tarnishing? can you not have been tarnishing? can he not have been tarnishing? can we not have been tarnishing? can you not have been tarnishing? can they not have been tarnishing?