can purl
Regular verb: purl - purled- purled

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I can purl
you can purl
he can purl
we can purl
you can purl
they can purl 	I can be purling
you can be purling
he can be purling
we can be purling
you can be purling
they can be purling	I can have purled
you can have purled
he can have purled
we can have purled
you can have purled
they can have purled	I can have been purling
you can have been purling
he can have been purling
we can have been purling
you can have been purling
they can have been purling	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I can't purl
you can't purl
he can't purl
we can't purl
you can't purl
they can't purl 	I can't be purling
you can't be purling
he can't be purling
we can't be purling
you can't be purling
they can't be purling	I can't have purled
you can't have purled
he can't have purled
we can't have purled
you can't have purled
they can't have purled	I can't have been purling
you can't have been purling
he can't have been purling
we can't have been purling
you can't have been purling
they can't have been purling	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
can I purl?
can you purl?
can he purl?
can we purl?
can you purl?
can they purl? 	can I be purling?
can you be purling?
can he be purling?
can we be purling?
can you be purling?
can they be purling? 	can I have purled?
can you have purled?
can he have purled?
can we have purled?
can you have purled?
can they have purled? 	can I have been purling?
can you have been purling?
can he have been purling?
can we have been purling?
can you have been purling?
can they have been purling? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
can't I purl?
can't you purl?
can't he purl?
can't we purl?
can't you purl?
can't they purl? 	can't I be purling?
can't you be purling?
can't he be purling?
can't we be purling?
can't you be purling?
can't they be purling? 	can't I have purled?
can't you have purled?
can't he have purled?
can't we have purled?
can't you have purled?
can't they have purled? 	can't I have been purling?
can't you have been purling?
can't he have been purling?
can't we have been purling?
can't you have been purling?
can't they have been purling?