could embrittle
Verbo regular: embrittle - embrittled- embrittled

Afirmación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I could embrittle
you could embrittle
he could embrittle
we could embrittle
you could embrittle
they could embrittle 	I could be embrittling
you could be embrittling
he could be embrittling
we could be embrittling
you could be embrittling
they could be embrittling	I could have embrittled
you could have embrittled
he could have embrittled
we could have embrittled
you could have embrittled
they could have embrittled	I could have been embrittling
you could have been embrittling
he could have been embrittling
we could have been embrittling
you could have been embrittling
they could have been embrittling	

Negación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I couldn't embrittle
you couldn't embrittle
he couldn't embrittle
we couldn't embrittle
you couldn't embrittle
they couldn't embrittle 	I couldn't be embrittling
you couldn't be embrittling
he couldn't be embrittling
we couldn't be embrittling
you couldn't be embrittling
they couldn't be embrittling	I couldn't have embrittled
you couldn't have embrittled
he couldn't have embrittled
we couldn't have embrittled
you couldn't have embrittled
they couldn't have embrittled	I couldn't have been embrittling
you couldn't have been embrittling
he couldn't have been embrittling
we couldn't have been embrittling
you couldn't have been embrittling
they couldn't have been embrittling	

Forma interrogativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
could I embrittle?
could you embrittle?
could he embrittle?
could we embrittle?
could you embrittle?
could they embrittle? 	could I be embrittling?
could you be embrittling?
could he be embrittling?
could we be embrittling?
could you be embrittling?
could they be embrittling? 	could I have embrittled?
could you have embrittled?
could he have embrittled?
could we have embrittled?
could you have embrittled?
could they have embrittled? 	could I have been embrittling?
could you have been embrittling?
could he have been embrittling?
could we have been embrittling?
could you have been embrittling?
could they have been embrittling? 	

Forma interro-negativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
couldn't I embrittle?
couldn't you embrittle?
couldn't he embrittle?
couldn't we embrittle?
couldn't you embrittle?
couldn't they embrittle? 	couldn't I be embrittling?
couldn't you be embrittling?
couldn't he be embrittling?
couldn't we be embrittling?
couldn't you be embrittling?
couldn't they be embrittling? 	couldn't I have embrittled?
couldn't you have embrittled?
couldn't he have embrittled?
couldn't we have embrittled?
couldn't you have embrittled?
couldn't they have embrittled? 	couldn't I have been embrittling?
couldn't you have been embrittling?
couldn't he have been embrittling?
couldn't we have been embrittling?
couldn't you have been embrittling?
couldn't they have been embrittling?