could brittle
Regular verb: brittle - brittled- brittled

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I could brittle
you could brittle
he could brittle
we could brittle
you could brittle
they could brittle 	I could be brittling
you could be brittling
he could be brittling
we could be brittling
you could be brittling
they could be brittling	I could have brittled
you could have brittled
he could have brittled
we could have brittled
you could have brittled
they could have brittled	I could have been brittling
you could have been brittling
he could have been brittling
we could have been brittling
you could have been brittling
they could have been brittling	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I couldn't brittle
you couldn't brittle
he couldn't brittle
we couldn't brittle
you couldn't brittle
they couldn't brittle 	I couldn't be brittling
you couldn't be brittling
he couldn't be brittling
we couldn't be brittling
you couldn't be brittling
they couldn't be brittling	I couldn't have brittled
you couldn't have brittled
he couldn't have brittled
we couldn't have brittled
you couldn't have brittled
they couldn't have brittled	I couldn't have been brittling
you couldn't have been brittling
he couldn't have been brittling
we couldn't have been brittling
you couldn't have been brittling
they couldn't have been brittling	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
could I brittle?
could you brittle?
could he brittle?
could we brittle?
could you brittle?
could they brittle? 	could I be brittling?
could you be brittling?
could he be brittling?
could we be brittling?
could you be brittling?
could they be brittling? 	could I have brittled?
could you have brittled?
could he have brittled?
could we have brittled?
could you have brittled?
could they have brittled? 	could I have been brittling?
could you have been brittling?
could he have been brittling?
could we have been brittling?
could you have been brittling?
could they have been brittling? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
couldn't I brittle?
couldn't you brittle?
couldn't he brittle?
couldn't we brittle?
couldn't you brittle?
couldn't they brittle? 	couldn't I be brittling?
couldn't you be brittling?
couldn't he be brittling?
couldn't we be brittling?
couldn't you be brittling?
couldn't they be brittling? 	couldn't I have brittled?
couldn't you have brittled?
couldn't he have brittled?
couldn't we have brittled?
couldn't you have brittled?
couldn't they have brittled? 	couldn't I have been brittling?
couldn't you have been brittling?
couldn't he have been brittling?
couldn't we have been brittling?
couldn't you have been brittling?
couldn't they have been brittling?