could whittle
Regular verb: whittle - whittled- whittled

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I could whittle
you could whittle
he could whittle
we could whittle
you could whittle
they could whittle 	I could be whittling
you could be whittling
he could be whittling
we could be whittling
you could be whittling
they could be whittling	I could have whittled
you could have whittled
he could have whittled
we could have whittled
you could have whittled
they could have whittled	I could have been whittling
you could have been whittling
he could have been whittling
we could have been whittling
you could have been whittling
they could have been whittling	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I could not whittle
you could not whittle
he could not whittle
we could not whittle
you could not whittle
they could not whittle 	I could not be whittling
you could not be whittling
he could not be whittling
we could not be whittling
you could not be whittling
they could not be whittling	I could not have whittled
you could not have whittled
he could not have whittled
we could not have whittled
you could not have whittled
they could not have whittled	I could not have been whittling
you could not have been whittling
he could not have been whittling
we could not have been whittling
you could not have been whittling
they could not have been whittling	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
could I whittle?
could you whittle?
could he whittle?
could we whittle?
could you whittle?
could they whittle? 	could I be whittling?
could you be whittling?
could he be whittling?
could we be whittling?
could you be whittling?
could they be whittling? 	could I have whittled?
could you have whittled?
could he have whittled?
could we have whittled?
could you have whittled?
could they have whittled? 	could I have been whittling?
could you have been whittling?
could he have been whittling?
could we have been whittling?
could you have been whittling?
could they have been whittling? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
could I not whittle?
could you not whittle?
could he not whittle?
could we not whittle?
could you not whittle?
could they not whittle? 	could I not be whittling?
could you not be whittling?
could he not be whittling?
could we not be whittling?
could you not be whittling?
could they not be whittling? 	could I not have whittled?
could you not have whittled?
could he not have whittled?
could we not have whittled?
could you not have whittled?
could they not have whittled? 	could I not have been whittling?
could you not have been whittling?
could he not have been whittling?
could we not have been whittling?
could you not have been whittling?
could they not have been whittling?