English verb conjugation
CAN PROTRUDE

Regular verb: protrude - protruded - protruded

Affirmation

Simple form	V-ing form
I can protrude you can protrude he can protrude we can protrude you can protrude they can protrude	I can be protruding you can be protruding he can be protruding we can be protruding you can be protruding they can be protruding
Perfect	V-ing perfect
I can have protruded you can have protruded he can have protruded we can have protruded you can have protruded they can have protruded	I can have been protruding you can have been protruding he can have been protruding we can have been protruding you can have been protruding they can have been protruding

Negation

Simple form	V-ing form
I can't protrude you can't protrude he can't protrude we can't protrude you can't protrude they can't protrude	I can't be protruding you can't be protruding he can't be protruding we can't be protruding you can't be protruding they can't be protruding
Perfect	V-ing perfect
I can't have protruded you can't have protruded he can't have protruded we can't have protruded you can't have protruded they can't have protruded	I can't have been protruding you can't have been protruding he can't have been protruding we can't have been protruding you can't have been protruding they can't have been protruding

Interrogative form

Simple form	V-ing form
can I protrude? can you protrude? can he protrude? can we protrude? can you protrude? can they protrude?	can I be protruding? can you be protruding? can he be protruding? can we be protruding? can you be protruding? can they be protruding?
Perfect	V-ing perfect
can I have protruded? can you have protruded? can he have protruded? can we have protruded? can you have protruded? can they have protruded?	can I have been protruding? can you have been protruding? can he have been protruding? can we have been protruding? can you have been protruding? can they have been protruding?

Interro-negative form

Simple form	V-ing form
can't I protrude? can't you protrude? can't he protrude? can't we protrude? can't you protrude? can't they protrude?	can't I be protruding? can't you be protruding? can't he be protruding? can't we be protruding? can't you be protruding? can't they be protruding?
Perfect	V-ing perfect
can't I have protruded? can't you have protruded? can't he have protruded? can't we have protruded? can't you have protruded? can't they have protruded?	can't I have been protruding? can't you have been protruding? can't he have been protruding? can't we have been protruding? can't you have been protruding? can't they have been protruding?