English verb conjugation
CAN PURL

Regular verb: purl - purled - purled

Affirmation

Simple form	V-ing form
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
Perfect	V-ing perfect
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
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
Perfect	V-ing perfect
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
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?
Perfect	V-ing perfect
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
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?
Perfect	V-ing perfect
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?