can undergo
Irregular verb: undergo - underwent- undergone

Affirmation 	
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I can undergo
you can undergo
he can undergo
we can undergo
you can undergo
they can undergo 	I can be undergoing
you can be undergoing
he can be undergoing
we can be undergoing
you can be undergoing
they can be undergoing	I can have undergone
you can have undergone
he can have undergone
we can have undergone
you can have undergone
they can have undergone	I can have been undergoing
you can have been undergoing
he can have been undergoing
we can have been undergoing
you can have been undergoing
they can have been undergoing	

Negation 	
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I cannot undergo
you cannot undergo
he cannot undergo
we cannot undergo
you cannot undergo
they cannot undergo 	I cannot be undergoing
you cannot be undergoing
he cannot be undergoing
we cannot be undergoing
you cannot be undergoing
they cannot be undergoing	I cannot have undergone
you cannot have undergone
he cannot have undergone
we cannot have undergone
you cannot have undergone
they cannot have undergone	I cannot have been undergoing
you cannot have been undergoing
he cannot have been undergoing
we cannot have been undergoing
you cannot have been undergoing
they cannot have been undergoing	

Interrogative form 	
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can I undergo?
can you undergo?
can he undergo?
can we undergo?
can you undergo?
can they undergo? 	can I be undergoing?
can you be undergoing?
can he be undergoing?
can we be undergoing?
can you be undergoing?
can they be undergoing? 	can I have undergone?
can you have undergone?
can he have undergone?
can we have undergone?
can you have undergone?
can they have undergone? 	can I have been undergoing?
can you have been undergoing?
can he have been undergoing?
can we have been undergoing?
can you have been undergoing?
can they have been undergoing? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
can I not undergo?
can you not undergo?
can he not undergo?
can we not undergo?
can you not undergo?
can they not undergo? 	can I not be undergoing?
can you not be undergoing?
can he not be undergoing?
can we not be undergoing?
can you not be undergoing?
can they not be undergoing? 	can I not have undergone?
can you not have undergone?
can he not have undergone?
can we not have undergone?
can you not have undergone?
can they not have undergone? 	can I not have been undergoing?
can you not have been undergoing?
can he not have been undergoing?
can we not have been undergoing?
can you not have been undergoing?
can they not have been undergoing?