could buttonhole
Verbo regular: buttonhole - buttonholed- buttonholed

Afirmação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
I could buttonhole
you could buttonhole
he could buttonhole
we could buttonhole
you could buttonhole
they could buttonhole 	I could be buttonholing
you could be buttonholing
he could be buttonholing
we could be buttonholing
you could be buttonholing
they could be buttonholing	I could have buttonholed
you could have buttonholed
he could have buttonholed
we could have buttonholed
you could have buttonholed
they could have buttonholed	I could have been buttonholing
you could have been buttonholing
he could have been buttonholing
we could have been buttonholing
you could have been buttonholing
they could have been buttonholing	

Negação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
I couldn't buttonhole
you couldn't buttonhole
he couldn't buttonhole
we couldn't buttonhole
you couldn't buttonhole
they couldn't buttonhole 	I couldn't be buttonholing
you couldn't be buttonholing
he couldn't be buttonholing
we couldn't be buttonholing
you couldn't be buttonholing
they couldn't be buttonholing	I couldn't have buttonholed
you couldn't have buttonholed
he couldn't have buttonholed
we couldn't have buttonholed
you couldn't have buttonholed
they couldn't have buttonholed	I couldn't have been buttonholing
you couldn't have been buttonholing
he couldn't have been buttonholing
we couldn't have been buttonholing
you couldn't have been buttonholing
they couldn't have been buttonholing	

Forma interrogativa 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
could I buttonhole?
could you buttonhole?
could he buttonhole?
could we buttonhole?
could you buttonhole?
could they buttonhole? 	could I be buttonholing?
could you be buttonholing?
could he be buttonholing?
could we be buttonholing?
could you be buttonholing?
could they be buttonholing? 	could I have buttonholed?
could you have buttonholed?
could he have buttonholed?
could we have buttonholed?
could you have buttonholed?
could they have buttonholed? 	could I have been buttonholing?
could you have been buttonholing?
could he have been buttonholing?
could we have been buttonholing?
could you have been buttonholing?
could they have been buttonholing? 	

Forma interro-Negação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
couldn't I buttonhole?
couldn't you buttonhole?
couldn't he buttonhole?
couldn't we buttonhole?
couldn't you buttonhole?
couldn't they buttonhole? 	couldn't I be buttonholing?
couldn't you be buttonholing?
couldn't he be buttonholing?
couldn't we be buttonholing?
couldn't you be buttonholing?
couldn't they be buttonholing? 	couldn't I have buttonholed?
couldn't you have buttonholed?
couldn't he have buttonholed?
couldn't we have buttonholed?
couldn't you have buttonholed?
couldn't they have buttonholed? 	couldn't I have been buttonholing?
couldn't you have been buttonholing?
couldn't he have been buttonholing?
couldn't we have been buttonholing?
couldn't you have been buttonholing?
couldn't they have been buttonholing?