English verb conjugation
CAN RAREFY

Regular verb: rarefy - rarefied - rarefied

Affirmation

Simple form	V-ing form
I can rarefy you can rarefy he can rarefy we can rarefy you can rarefy they can rarefy	I can be rarefying you can be rarefying he can be rarefying we can be rarefying you can be rarefying they can be rarefying
Perfect	V-ing perfect
I can have rarefied you can have rarefied he can have rarefied we can have rarefied you can have rarefied they can have rarefied	I can have been rarefying you can have been rarefying he can have been rarefying we can have been rarefying you can have been rarefying they can have been rarefying

Negation

Simple form	V-ing form
I cannot rarefy you cannot rarefy he cannot rarefy we cannot rarefy you cannot rarefy they cannot rarefy	I cannot be rarefying you cannot be rarefying he cannot be rarefying we cannot be rarefying you cannot be rarefying they cannot be rarefying
Perfect	V-ing perfect
I cannot have rarefied you cannot have rarefied he cannot have rarefied we cannot have rarefied you cannot have rarefied they cannot have rarefied	I cannot have been rarefying you cannot have been rarefying he cannot have been rarefying we cannot have been rarefying you cannot have been rarefying they cannot have been rarefying

Interrogative form

Simple form	V-ing form
can I rarefy? can you rarefy? can he rarefy? can we rarefy? can you rarefy? can they rarefy?	can I be rarefying? can you be rarefying? can he be rarefying? can we be rarefying? can you be rarefying? can they be rarefying?
Perfect	V-ing perfect
can I have rarefied? can you have rarefied? can he have rarefied? can we have rarefied? can you have rarefied? can they have rarefied?	can I have been rarefying? can you have been rarefying? can he have been rarefying? can we have been rarefying? can you have been rarefying? can they have been rarefying?

Interro-negative form

Simple form	V-ing form
can I not rarefy? can you not rarefy? can he not rarefy? can we not rarefy? can you not rarefy? can they not rarefy?	can I not be rarefying? can you not be rarefying? can he not be rarefying? can we not be rarefying? can you not be rarefying? can they not be rarefying?
Perfect	V-ing perfect
can I not have rarefied? can you not have rarefied? can he not have rarefied? can we not have rarefied? can you not have rarefied? can they not have rarefied?	can I not have been rarefying? can you not have been rarefying? can he not have been rarefying? can we not have been rarefying? can you not have been rarefying? can they not have been rarefying?