can tinker
Verbo regular: tinker - tinkered- tinkered

Afirmação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
I can tinker
you can tinker
he can tinker
we can tinker
you can tinker
they can tinker 	I can be tinkering
you can be tinkering
he can be tinkering
we can be tinkering
you can be tinkering
they can be tinkering	I can have tinkered
you can have tinkered
he can have tinkered
we can have tinkered
you can have tinkered
they can have tinkered	I can have been tinkering
you can have been tinkering
he can have been tinkering
we can have been tinkering
you can have been tinkering
they can have been tinkering	

Negação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
I cannot tinker
you cannot tinker
he cannot tinker
we cannot tinker
you cannot tinker
they cannot tinker 	I cannot be tinkering
you cannot be tinkering
he cannot be tinkering
we cannot be tinkering
you cannot be tinkering
they cannot be tinkering	I cannot have tinkered
you cannot have tinkered
he cannot have tinkered
we cannot have tinkered
you cannot have tinkered
they cannot have tinkered	I cannot have been tinkering
you cannot have been tinkering
he cannot have been tinkering
we cannot have been tinkering
you cannot have been tinkering
they cannot have been tinkering	

Forma interrogativa 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
can I tinker?
can you tinker?
can he tinker?
can we tinker?
can you tinker?
can they tinker? 	can I be tinkering?
can you be tinkering?
can he be tinkering?
can we be tinkering?
can you be tinkering?
can they be tinkering? 	can I have tinkered?
can you have tinkered?
can he have tinkered?
can we have tinkered?
can you have tinkered?
can they have tinkered? 	can I have been tinkering?
can you have been tinkering?
can he have been tinkering?
can we have been tinkering?
can you have been tinkering?
can they have been tinkering? 	

Forma interro-Negação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
can I not tinker?
can you not tinker?
can he not tinker?
can we not tinker?
can you not tinker?
can they not tinker? 	can I not be tinkering?
can you not be tinkering?
can he not be tinkering?
can we not be tinkering?
can you not be tinkering?
can they not be tinkering? 	can I not have tinkered?
can you not have tinkered?
can he not have tinkered?
can we not have tinkered?
can you not have tinkered?
can they not have tinkered? 	can I not have been tinkering?
can you not have been tinkering?
can he not have been tinkering?
can we not have been tinkering?
can you not have been tinkering?
can they not have been tinkering?