I can interest you can interest she can interest we can interest you can interest they can interest
V-ing form
I can be interesting you can be interesting she can be interesting we can be interesting you can be interesting they can be interesting
Perfect
I can have interested you can have interested she 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 she 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 she 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 she 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 she 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 she 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 she interest? can we interest? can you interest? can they interest?
V-ing form
can I be interesting? can you be interesting? can she be interesting? can we be interesting? can you be interesting? can they be interesting?
Perfect
can I have interested? can you have interested? can she 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 she 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 she 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 she 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 she 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 she have been interesting? can't we have been interesting? can't you have been interesting? can't they have been interesting?