can enhance
Regular verb: enhance - enhanced- enhanced

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I can enhance
you can enhance
she can enhance
we can enhance
you can enhance
they can enhance 	I can be enhancing
you can be enhancing
she can be enhancing
we can be enhancing
you can be enhancing
they can be enhancing	I can have enhanced
you can have enhanced
she can have enhanced
we can have enhanced
you can have enhanced
they can have enhanced	I can have been enhancing
you can have been enhancing
she can have been enhancing
we can have been enhancing
you can have been enhancing
they can have been enhancing	

Negation 	
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I can't enhance
you can't enhance
she can't enhance
we can't enhance
you can't enhance
they can't enhance 	I can't be enhancing
you can't be enhancing
she can't be enhancing
we can't be enhancing
you can't be enhancing
they can't be enhancing	I can't have enhanced
you can't have enhanced
she can't have enhanced
we can't have enhanced
you can't have enhanced
they can't have enhanced	I can't have been enhancing
you can't have been enhancing
she can't have been enhancing
we can't have been enhancing
you can't have been enhancing
they can't have been enhancing	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
can I enhance?
can you enhance?
can she enhance?
can we enhance?
can you enhance?
can they enhance? 	can I be enhancing?
can you be enhancing?
can she be enhancing?
can we be enhancing?
can you be enhancing?
can they be enhancing? 	can I have enhanced?
can you have enhanced?
can she have enhanced?
can we have enhanced?
can you have enhanced?
can they have enhanced? 	can I have been enhancing?
can you have been enhancing?
can she have been enhancing?
can we have been enhancing?
can you have been enhancing?
can they have been enhancing? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
can't I enhance?
can't you enhance?
can't she enhance?
can't we enhance?
can't you enhance?
can't they enhance? 	can't I be enhancing?
can't you be enhancing?
can't she be enhancing?
can't we be enhancing?
can't you be enhancing?
can't they be enhancing? 	can't I have enhanced?
can't you have enhanced?
can't she have enhanced?
can't we have enhanced?
can't you have enhanced?
can't they have enhanced? 	can't I have been enhancing?
can't you have been enhancing?
can't she have been enhancing?
can't we have been enhancing?
can't you have been enhancing?
can't they have been enhancing?