can challenge
Verbo regolare: challenge - challenged- challenged

Affermazione 	
Forma semplice 	Forma con V-ing 	Perfetto 	Perfetto con V-ing 	
I can challenge
you can challenge
he can challenge
we can challenge
you can challenge
they can challenge 	I can be challenging
you can be challenging
he can be challenging
we can be challenging
you can be challenging
they can be challenging	I can have challenged
you can have challenged
he can have challenged
we can have challenged
you can have challenged
they can have challenged	I can have been challenging
you can have been challenging
he can have been challenging
we can have been challenging
you can have been challenging
they can have been challenging	

Negazione 	
Forma semplice 	Forma con V-ing 	Perfetto 	Perfetto con V-ing 	
I cannot challenge
you cannot challenge
he cannot challenge
we cannot challenge
you cannot challenge
they cannot challenge 	I cannot be challenging
you cannot be challenging
he cannot be challenging
we cannot be challenging
you cannot be challenging
they cannot be challenging	I cannot have challenged
you cannot have challenged
he cannot have challenged
we cannot have challenged
you cannot have challenged
they cannot have challenged	I cannot have been challenging
you cannot have been challenging
he cannot have been challenging
we cannot have been challenging
you cannot have been challenging
they cannot have been challenging	

Forma interrogativa 	
Forma semplice 	Forma con V-ing 	Perfetto 	Perfetto con V-ing 	
can I challenge?
can you challenge?
can he challenge?
can we challenge?
can you challenge?
can they challenge? 	can I be challenging?
can you be challenging?
can he be challenging?
can we be challenging?
can you be challenging?
can they be challenging? 	can I have challenged?
can you have challenged?
can he have challenged?
can we have challenged?
can you have challenged?
can they have challenged? 	can I have been challenging?
can you have been challenging?
can he have been challenging?
can we have been challenging?
can you have been challenging?
can they have been challenging? 	

Forma interro-negativa 	
Forma semplice 	Forma con V-ing 	Perfetto 	Perfetto con V-ing 	
can I not challenge?
can you not challenge?
can he not challenge?
can we not challenge?
can you not challenge?
can they not challenge? 	can I not be challenging?
can you not be challenging?
can he not be challenging?
can we not be challenging?
can you not be challenging?
can they not be challenging? 	can I not have challenged?
can you not have challenged?
can he not have challenged?
can we not have challenged?
can you not have challenged?
can they not have challenged? 	can I not have been challenging?
can you not have been challenging?
can he not have been challenging?
can we not have been challenging?
can you not have been challenging?
can they not have been challenging?