I can buttonhole you can buttonhole she can buttonhole we can buttonhole you can buttonhole they can buttonhole
V-ing form
I can be buttonholing you can be buttonholing she can be buttonholing we can be buttonholing you can be buttonholing they can be buttonholing
Perfect
I can have buttonholed you can have buttonholed she can have buttonholed we can have buttonholed you can have buttonholed they can have buttonholed
V-ing perfect
I can have been buttonholing you can have been buttonholing she can have been buttonholing we can have been buttonholing you can have been buttonholing they can have been buttonholing
Negation
Simple form
I can't buttonhole you can't buttonhole she can't buttonhole we can't buttonhole you can't buttonhole they can't buttonhole
V-ing form
I can't be buttonholing you can't be buttonholing she can't be buttonholing we can't be buttonholing you can't be buttonholing they can't be buttonholing
Perfect
I can't have buttonholed you can't have buttonholed she can't have buttonholed we can't have buttonholed you can't have buttonholed they can't have buttonholed
V-ing perfect
I can't have been buttonholing you can't have been buttonholing she can't have been buttonholing we can't have been buttonholing you can't have been buttonholing they can't have been buttonholing
Interrogative form
Simple form
can I buttonhole? can you buttonhole? can she buttonhole? can we buttonhole? can you buttonhole? can they buttonhole?
V-ing form
can I be buttonholing? can you be buttonholing? can she be buttonholing? can we be buttonholing? can you be buttonholing? can they be buttonholing?
Perfect
can I have buttonholed? can you have buttonholed? can she have buttonholed? can we have buttonholed? can you have buttonholed? can they have buttonholed?
V-ing perfect
can I have been buttonholing? can you have been buttonholing? can she have been buttonholing? can we have been buttonholing? can you have been buttonholing? can they have been buttonholing?
Interro-negative form
Simple form
can't I buttonhole? can't you buttonhole? can't she buttonhole? can't we buttonhole? can't you buttonhole? can't they buttonhole?
V-ing form
can't I be buttonholing? can't you be buttonholing? can't she be buttonholing? can't we be buttonholing? can't you be buttonholing? can't they be buttonholing?
Perfect
can't I have buttonholed? can't you have buttonholed? can't she have buttonholed? can't we have buttonholed? can't you have buttonholed? can't they have buttonholed?
V-ing perfect
can't I have been buttonholing? can't you have been buttonholing? can't she have been buttonholing? can't we have been buttonholing? can't you have been buttonholing? can't they have been buttonholing?