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 can't tan you can't tan he can't tan we can't tan you can't tan they can't tan	I can't be tanning you can't be tanning he can't be tanning we can't be tanning you can't be tanning they can't be tanning
Perfect	V-ing perfect
I can't have tanned you can't have tanned he can't have tanned we can't have tanned you can't have tanned they can't have tanned	I can't have been tanning you can't have been tanning he can't have been tanning we can't have been tanning you can't have been tanning they can't 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't I tan? can't you tan? can't he tan? can't we tan? can't you tan? can't they tan?	can't I be tanning? can't you be tanning? can't he be tanning? can't we be tanning? can't you be tanning? can't they be tanning?
Perfect	V-ing perfect
can't I have tanned? can't you have tanned? can't he have tanned? can't we have tanned? can't you have tanned? can't they have tanned?	can't I have been tanning? can't you have been tanning? can't he have been tanning? can't we have been tanning? can't you have been tanning? can't they have been tanning?