could tissue
Verbo regular: tissue - tissued- tissued

Afirmação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
I could tissue
you could tissue
he could tissue
we could tissue
you could tissue
they could tissue 	I could be tissuing
you could be tissuing
he could be tissuing
we could be tissuing
you could be tissuing
they could be tissuing	I could have tissued
you could have tissued
he could have tissued
we could have tissued
you could have tissued
they could have tissued	I could have been tissuing
you could have been tissuing
he could have been tissuing
we could have been tissuing
you could have been tissuing
they could have been tissuing	

Negação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
I couldn't tissue
you couldn't tissue
he couldn't tissue
we couldn't tissue
you couldn't tissue
they couldn't tissue 	I couldn't be tissuing
you couldn't be tissuing
he couldn't be tissuing
we couldn't be tissuing
you couldn't be tissuing
they couldn't be tissuing	I couldn't have tissued
you couldn't have tissued
he couldn't have tissued
we couldn't have tissued
you couldn't have tissued
they couldn't have tissued	I couldn't have been tissuing
you couldn't have been tissuing
he couldn't have been tissuing
we couldn't have been tissuing
you couldn't have been tissuing
they couldn't have been tissuing	

Forma interrogativa 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
could I tissue?
could you tissue?
could he tissue?
could we tissue?
could you tissue?
could they tissue? 	could I be tissuing?
could you be tissuing?
could he be tissuing?
could we be tissuing?
could you be tissuing?
could they be tissuing? 	could I have tissued?
could you have tissued?
could he have tissued?
could we have tissued?
could you have tissued?
could they have tissued? 	could I have been tissuing?
could you have been tissuing?
could he have been tissuing?
could we have been tissuing?
could you have been tissuing?
could they have been tissuing? 	

Forma interro-Negação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
couldn't I tissue?
couldn't you tissue?
couldn't he tissue?
couldn't we tissue?
couldn't you tissue?
couldn't they tissue? 	couldn't I be tissuing?
couldn't you be tissuing?
couldn't he be tissuing?
couldn't we be tissuing?
couldn't you be tissuing?
couldn't they be tissuing? 	couldn't I have tissued?
couldn't you have tissued?
couldn't he have tissued?
couldn't we have tissued?
couldn't you have tissued?
couldn't they have tissued? 	couldn't I have been tissuing?
couldn't you have been tissuing?
couldn't he have been tissuing?
couldn't we have been tissuing?
couldn't you have been tissuing?
couldn't they have been tissuing?