can buck
Verbo regular: buck - bucked- bucked

Afirmação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
I can buck
you can buck
he can buck
we can buck
you can buck
they can buck 	I can be bucking
you can be bucking
he can be bucking
we can be bucking
you can be bucking
they can be bucking	I can have bucked
you can have bucked
he can have bucked
we can have bucked
you can have bucked
they can have bucked	I can have been bucking
you can have been bucking
he can have been bucking
we can have been bucking
you can have been bucking
they can have been bucking	

Negação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
I can't buck
you can't buck
he can't buck
we can't buck
you can't buck
they can't buck 	I can't be bucking
you can't be bucking
he can't be bucking
we can't be bucking
you can't be bucking
they can't be bucking	I can't have bucked
you can't have bucked
he can't have bucked
we can't have bucked
you can't have bucked
they can't have bucked	I can't have been bucking
you can't have been bucking
he can't have been bucking
we can't have been bucking
you can't have been bucking
they can't have been bucking	

Forma interrogativa 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
can I buck?
can you buck?
can he buck?
can we buck?
can you buck?
can they buck? 	can I be bucking?
can you be bucking?
can he be bucking?
can we be bucking?
can you be bucking?
can they be bucking? 	can I have bucked?
can you have bucked?
can he have bucked?
can we have bucked?
can you have bucked?
can they have bucked? 	can I have been bucking?
can you have been bucking?
can he have been bucking?
can we have been bucking?
can you have been bucking?
can they have been bucking? 	

Forma interro-Negação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
can't I buck?
can't you buck?
can't he buck?
can't we buck?
can't you buck?
can't they buck? 	can't I be bucking?
can't you be bucking?
can't he be bucking?
can't we be bucking?
can't you be bucking?
can't they be bucking? 	can't I have bucked?
can't you have bucked?
can't he have bucked?
can't we have bucked?
can't you have bucked?
can't they have bucked? 	can't I have been bucking?
can't you have been bucking?
can't he have been bucking?
can't we have been bucking?
can't you have been bucking?
can't they have been bucking?