can yak
Verbo regular: yak - yaked- yaked

Afirmação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
I can yak
you can yak
he can yak
we can yak
you can yak
they can yak 	I can be yaking
you can be yaking
he can be yaking
we can be yaking
you can be yaking
they can be yaking	I can have yaked
you can have yaked
he can have yaked
we can have yaked
you can have yaked
they can have yaked	I can have been yaking
you can have been yaking
he can have been yaking
we can have been yaking
you can have been yaking
they can have been yaking	

Negação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
I cannot yak
you cannot yak
he cannot yak
we cannot yak
you cannot yak
they cannot yak 	I cannot be yaking
you cannot be yaking
he cannot be yaking
we cannot be yaking
you cannot be yaking
they cannot be yaking	I cannot have yaked
you cannot have yaked
he cannot have yaked
we cannot have yaked
you cannot have yaked
they cannot have yaked	I cannot have been yaking
you cannot have been yaking
he cannot have been yaking
we cannot have been yaking
you cannot have been yaking
they cannot have been yaking	

Forma interrogativa 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
can I yak?
can you yak?
can he yak?
can we yak?
can you yak?
can they yak? 	can I be yaking?
can you be yaking?
can he be yaking?
can we be yaking?
can you be yaking?
can they be yaking? 	can I have yaked?
can you have yaked?
can he have yaked?
can we have yaked?
can you have yaked?
can they have yaked? 	can I have been yaking?
can you have been yaking?
can he have been yaking?
can we have been yaking?
can you have been yaking?
can they have been yaking? 	

Forma interro-Negação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
can I not yak?
can you not yak?
can he not yak?
can we not yak?
can you not yak?
can they not yak? 	can I not be yaking?
can you not be yaking?
can he not be yaking?
can we not be yaking?
can you not be yaking?
can they not be yaking? 	can I not have yaked?
can you not have yaked?
can he not have yaked?
can we not have yaked?
can you not have yaked?
can they not have yaked? 	can I not have been yaking?
can you not have been yaking?
can he not have been yaking?
can we not have been yaking?
can you not have been yaking?
can they not have been yaking?