I can interest you can interest he can interest we can interest you can interest they can interest
V-ing form
I can be interesting you can be interesting he can be interesting we can be interesting you can be interesting they can be interesting
Perfect
I can have interested you can have interested he can have interested we can have interested you can have interested they can have interested
V-ing perfect
I can have been interesting you can have been interesting he can have been interesting we can have been interesting you can have been interesting they can have been interesting
Negation
Simple form
I can't interest you can't interest he can't interest we can't interest you can't interest they can't interest
V-ing form
I can't be interesting you can't be interesting he can't be interesting we can't be interesting you can't be interesting they can't be interesting
Perfect
I can't have interested you can't have interested he can't have interested we can't have interested you can't have interested they can't have interested
V-ing perfect
I can't have been interesting you can't have been interesting he can't have been interesting we can't have been interesting you can't have been interesting they can't have been interesting
Interrogative form
Simple form
can I interest? can you interest? can he interest? can we interest? can you interest? can they interest?
V-ing form
can I be interesting? can you be interesting? can he be interesting? can we be interesting? can you be interesting? can they be interesting?
Perfect
can I have interested? can you have interested? can he have interested? can we have interested? can you have interested? can they have interested?
V-ing perfect
can I have been interesting? can you have been interesting? can he have been interesting? can we have been interesting? can you have been interesting? can they have been interesting?
Interro-negative form
Simple form
can't I interest? can't you interest? can't he interest? can't we interest? can't you interest? can't they interest?
V-ing form
can't I be interesting? can't you be interesting? can't he be interesting? can't we be interesting? can't you be interesting? can't they be interesting?
Perfect
can't I have interested? can't you have interested? can't he have interested? can't we have interested? can't you have interested? can't they have interested?
V-ing perfect
can't I have been interesting? can't you have been interesting? can't he have been interesting? can't we have been interesting? can't you have been interesting? can't they have been interesting?