can sex
Regular verb: sex - sexed- sexed

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I can sex
you can sex
she can sex
we can sex
you can sex
they can sex 	I can be sexing
you can be sexing
she can be sexing
we can be sexing
you can be sexing
they can be sexing	I can have sexed
you can have sexed
she can have sexed
we can have sexed
you can have sexed
they can have sexed	I can have been sexing
you can have been sexing
she can have been sexing
we can have been sexing
you can have been sexing
they can have been sexing	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I cannot sex
you cannot sex
she cannot sex
we cannot sex
you cannot sex
they cannot sex 	I cannot be sexing
you cannot be sexing
she cannot be sexing
we cannot be sexing
you cannot be sexing
they cannot be sexing	I cannot have sexed
you cannot have sexed
she cannot have sexed
we cannot have sexed
you cannot have sexed
they cannot have sexed	I cannot have been sexing
you cannot have been sexing
she cannot have been sexing
we cannot have been sexing
you cannot have been sexing
they cannot have been sexing	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
can I sex?
can you sex?
can she sex?
can we sex?
can you sex?
can they sex? 	can I be sexing?
can you be sexing?
can she be sexing?
can we be sexing?
can you be sexing?
can they be sexing? 	can I have sexed?
can you have sexed?
can she have sexed?
can we have sexed?
can you have sexed?
can they have sexed? 	can I have been sexing?
can you have been sexing?
can she have been sexing?
can we have been sexing?
can you have been sexing?
can they have been sexing? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
can I not sex?
can you not sex?
can she not sex?
can we not sex?
can you not sex?
can they not sex? 	can I not be sexing?
can you not be sexing?
can she not be sexing?
can we not be sexing?
can you not be sexing?
can they not be sexing? 	can I not have sexed?
can you not have sexed?
can she not have sexed?
can we not have sexed?
can you not have sexed?
can they not have sexed? 	can I not have been sexing?
can you not have been sexing?
can she not have been sexing?
can we not have been sexing?
can you not have been sexing?
can they not have been sexing?