could mull
Verbo regular: mull - mulled- mulled

Afirmación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I could mull
you could mull
he could mull
we could mull
you could mull
they could mull 	I could be mulling
you could be mulling
he could be mulling
we could be mulling
you could be mulling
they could be mulling	I could have mulled
you could have mulled
he could have mulled
we could have mulled
you could have mulled
they could have mulled	I could have been mulling
you could have been mulling
he could have been mulling
we could have been mulling
you could have been mulling
they could have been mulling	

Negación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I couldn't mull
you couldn't mull
he couldn't mull
we couldn't mull
you couldn't mull
they couldn't mull 	I couldn't be mulling
you couldn't be mulling
he couldn't be mulling
we couldn't be mulling
you couldn't be mulling
they couldn't be mulling	I couldn't have mulled
you couldn't have mulled
he couldn't have mulled
we couldn't have mulled
you couldn't have mulled
they couldn't have mulled	I couldn't have been mulling
you couldn't have been mulling
he couldn't have been mulling
we couldn't have been mulling
you couldn't have been mulling
they couldn't have been mulling	

Forma interrogativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
could I mull?
could you mull?
could he mull?
could we mull?
could you mull?
could they mull? 	could I be mulling?
could you be mulling?
could he be mulling?
could we be mulling?
could you be mulling?
could they be mulling? 	could I have mulled?
could you have mulled?
could he have mulled?
could we have mulled?
could you have mulled?
could they have mulled? 	could I have been mulling?
could you have been mulling?
could he have been mulling?
could we have been mulling?
could you have been mulling?
could they have been mulling? 	

Forma interro-negativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
couldn't I mull?
couldn't you mull?
couldn't he mull?
couldn't we mull?
couldn't you mull?
couldn't they mull? 	couldn't I be mulling?
couldn't you be mulling?
couldn't he be mulling?
couldn't we be mulling?
couldn't you be mulling?
couldn't they be mulling? 	couldn't I have mulled?
couldn't you have mulled?
couldn't he have mulled?
couldn't we have mulled?
couldn't you have mulled?
couldn't they have mulled? 	couldn't I have been mulling?
couldn't you have been mulling?
couldn't he have been mulling?
couldn't we have been mulling?
couldn't you have been mulling?
couldn't they have been mulling?