I can starboard you can starboard he can starboard we can starboard you can starboard they can starboard
V-ing form
I can be starboarding you can be starboarding he can be starboarding we can be starboarding you can be starboarding they can be starboarding
Perfect
I can have starboarded you can have starboarded he can have starboarded we can have starboarded you can have starboarded they can have starboarded
V-ing perfect
I can have been starboarding you can have been starboarding he can have been starboarding we can have been starboarding you can have been starboarding they can have been starboarding
Negation
Simple form
I can't starboard you can't starboard he can't starboard we can't starboard you can't starboard they can't starboard
V-ing form
I can't be starboarding you can't be starboarding he can't be starboarding we can't be starboarding you can't be starboarding they can't be starboarding
Perfect
I can't have starboarded you can't have starboarded he can't have starboarded we can't have starboarded you can't have starboarded they can't have starboarded
V-ing perfect
I can't have been starboarding you can't have been starboarding he can't have been starboarding we can't have been starboarding you can't have been starboarding they can't have been starboarding
Interrogative form
Simple form
can I starboard? can you starboard? can he starboard? can we starboard? can you starboard? can they starboard?
V-ing form
can I be starboarding? can you be starboarding? can he be starboarding? can we be starboarding? can you be starboarding? can they be starboarding?
Perfect
can I have starboarded? can you have starboarded? can he have starboarded? can we have starboarded? can you have starboarded? can they have starboarded?
V-ing perfect
can I have been starboarding? can you have been starboarding? can he have been starboarding? can we have been starboarding? can you have been starboarding? can they have been starboarding?
Interro-negative form
Simple form
can't I starboard? can't you starboard? can't he starboard? can't we starboard? can't you starboard? can't they starboard?
V-ing form
can't I be starboarding? can't you be starboarding? can't he be starboarding? can't we be starboarding? can't you be starboarding? can't they be starboarding?
Perfect
can't I have starboarded? can't you have starboarded? can't he have starboarded? can't we have starboarded? can't you have starboarded? can't they have starboarded?
V-ing perfect
can't I have been starboarding? can't you have been starboarding? can't he have been starboarding? can't we have been starboarding? can't you have been starboarding? can't they have been starboarding?