Conjugación del verbo inglés
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Verbo regular: purl - purled - purled

Afirmación

Forma simple	Forma con V-ing
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
Perfecto	Perfecto con V-ing
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

Negación

Forma simple	Forma con V-ing
I cannot purl you cannot purl he cannot purl we cannot purl you cannot purl they cannot purl	I cannot be purling you cannot be purling he cannot be purling we cannot be purling you cannot be purling they cannot be purling
Perfecto	Perfecto con V-ing
I cannot have purled you cannot have purled he cannot have purled we cannot have purled you cannot have purled they cannot have purled	I cannot have been purling you cannot have been purling he cannot have been purling we cannot have been purling you cannot have been purling they cannot have been purling

Forma interrogativa

Forma simple	Forma con V-ing
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?
Perfecto	Perfecto con V-ing
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?

Forma interro-negativa

Forma simple	Forma con V-ing
can I not purl? can you not purl? can he not purl? can we not purl? can you not purl? can they not purl?	can I not be purling? can you not be purling? can he not be purling? can we not be purling? can you not be purling? can they not be purling?
Perfecto	Perfecto con V-ing
can I not have purled? can you not have purled? can he not have purled? can we not have purled? can you not have purled? can they not have purled?	can I not have been purling? can you not have been purling? can he not have been purling? can we not have been purling? can you not have been purling? can they not have been purling?