English verb conjugation
CAN SURFBOARD

Regular verb: surfboard - surfboarded - surfboarded

Affirmation

Simple form	V-ing form
I can surfboard you can surfboard he can surfboard we can surfboard you can surfboard they can surfboard	I can be surfboarding you can be surfboarding he can be surfboarding we can be surfboarding you can be surfboarding they can be surfboarding
Perfect	V-ing perfect
I can have surfboarded you can have surfboarded he can have surfboarded we can have surfboarded you can have surfboarded they can have surfboarded	I can have been surfboarding you can have been surfboarding he can have been surfboarding we can have been surfboarding you can have been surfboarding they can have been surfboarding

Negation

Simple form	V-ing form
I can't surfboard you can't surfboard he can't surfboard we can't surfboard you can't surfboard they can't surfboard	I can't be surfboarding you can't be surfboarding he can't be surfboarding we can't be surfboarding you can't be surfboarding they can't be surfboarding
Perfect	V-ing perfect
I can't have surfboarded you can't have surfboarded he can't have surfboarded we can't have surfboarded you can't have surfboarded they can't have surfboarded	I can't have been surfboarding you can't have been surfboarding he can't have been surfboarding we can't have been surfboarding you can't have been surfboarding they can't have been surfboarding

Interrogative form

Simple form	V-ing form
can I surfboard? can you surfboard? can he surfboard? can we surfboard? can you surfboard? can they surfboard?	can I be surfboarding? can you be surfboarding? can he be surfboarding? can we be surfboarding? can you be surfboarding? can they be surfboarding?
Perfect	V-ing perfect
can I have surfboarded? can you have surfboarded? can he have surfboarded? can we have surfboarded? can you have surfboarded? can they have surfboarded?	can I have been surfboarding? can you have been surfboarding? can he have been surfboarding? can we have been surfboarding? can you have been surfboarding? can they have been surfboarding?

Interro-negative form

Simple form	V-ing form
can't I surfboard? can't you surfboard? can't he surfboard? can't we surfboard? can't you surfboard? can't they surfboard?	can't I be surfboarding? can't you be surfboarding? can't he be surfboarding? can't we be surfboarding? can't you be surfboarding? can't they be surfboarding?
Perfect	V-ing perfect
can't I have surfboarded? can't you have surfboarded? can't he have surfboarded? can't we have surfboarded? can't you have surfboarded? can't they have surfboarded?	can't I have been surfboarding? can't you have been surfboarding? can't he have been surfboarding? can't we have been surfboarding? can't you have been surfboarding? can't they have been surfboarding?