English verb conjugation
CAN TAN

Regular verb: tan - tanned - tanned

Affirmation

Simple form	V-ing form
I can tan you can tan he can tan we can tan you can tan they can tan	I can be tanning you can be tanning he can be tanning we can be tanning you can be tanning they can be tanning
Perfect	V-ing perfect
I can have tanned you can have tanned he can have tanned we can have tanned you can have tanned they can have tanned	I can have been tanning you can have been tanning he can have been tanning we can have been tanning you can have been tanning they can have been tanning

Negation

Simple form	V-ing form
I cannot tan you cannot tan he cannot tan we cannot tan you cannot tan they cannot tan	I cannot be tanning you cannot be tanning he cannot be tanning we cannot be tanning you cannot be tanning they cannot be tanning
Perfect	V-ing perfect
I cannot have tanned you cannot have tanned he cannot have tanned we cannot have tanned you cannot have tanned they cannot have tanned	I cannot have been tanning you cannot have been tanning he cannot have been tanning we cannot have been tanning you cannot have been tanning they cannot have been tanning

Interrogative form

Simple form	V-ing form
can I tan? can you tan? can he tan? can we tan? can you tan? can they tan?	can I be tanning? can you be tanning? can he be tanning? can we be tanning? can you be tanning? can they be tanning?
Perfect	V-ing perfect
can I have tanned? can you have tanned? can he have tanned? can we have tanned? can you have tanned? can they have tanned?	can I have been tanning? can you have been tanning? can he have been tanning? can we have been tanning? can you have been tanning? can they have been tanning?

Interro-negative form

Simple form	V-ing form
can I not tan? can you not tan? can he not tan? can we not tan? can you not tan? can they not tan?	can I not be tanning? can you not be tanning? can he not be tanning? can we not be tanning? can you not be tanning? can they not be tanning?
Perfect	V-ing perfect
can I not have tanned? can you not have tanned? can he not have tanned? can we not have tanned? can you not have tanned? can they not have tanned?	can I not have been tanning? can you not have been tanning? can he not have been tanning? can we not have been tanning? can you not have been tanning? can they not have been tanning?