Conjugación del verbo inglés
CAN IMPUGN

Verbo regular: impugn - impugned - impugned

Afirmación

Forma simple	Forma con V-ing
I can impugn you can impugn she can impugn we can impugn you can impugn they can impugn	I can be impugning you can be impugning she can be impugning we can be impugning you can be impugning they can be impugning
Perfecto	Perfecto con V-ing
I can have impugned you can have impugned she can have impugned we can have impugned you can have impugned they can have impugned	I can have been impugning you can have been impugning she can have been impugning we can have been impugning you can have been impugning they can have been impugning

Negación

Forma simple	Forma con V-ing
I cannot impugn you cannot impugn she cannot impugn we cannot impugn you cannot impugn they cannot impugn	I cannot be impugning you cannot be impugning she cannot be impugning we cannot be impugning you cannot be impugning they cannot be impugning
Perfecto	Perfecto con V-ing
I cannot have impugned you cannot have impugned she cannot have impugned we cannot have impugned you cannot have impugned they cannot have impugned	I cannot have been impugning you cannot have been impugning she cannot have been impugning we cannot have been impugning you cannot have been impugning they cannot have been impugning

Forma interrogativa

Forma simple	Forma con V-ing
can I impugn? can you impugn? can she impugn? can we impugn? can you impugn? can they impugn?	can I be impugning? can you be impugning? can she be impugning? can we be impugning? can you be impugning? can they be impugning?
Perfecto	Perfecto con V-ing
can I have impugned? can you have impugned? can she have impugned? can we have impugned? can you have impugned? can they have impugned?	can I have been impugning? can you have been impugning? can she have been impugning? can we have been impugning? can you have been impugning? can they have been impugning?

Forma interro-negativa

Forma simple	Forma con V-ing
can I not impugn? can you not impugn? can she not impugn? can we not impugn? can you not impugn? can they not impugn?	can I not be impugning? can you not be impugning? can she not be impugning? can we not be impugning? can you not be impugning? can they not be impugning?
Perfecto	Perfecto con V-ing
can I not have impugned? can you not have impugned? can she not have impugned? can we not have impugned? can you not have impugned? can they not have impugned?	can I not have been impugning? can you not have been impugning? can she not have been impugning? can we not have been impugning? can you not have been impugning? can they not have been impugning?