can twin
Regular verb: twin - twinned- twinned

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I can twin
you can twin
she can twin
we can twin
you can twin
they can twin 	I can be twinning
you can be twinning
she can be twinning
we can be twinning
you can be twinning
they can be twinning	I can have twinned
you can have twinned
she can have twinned
we can have twinned
you can have twinned
they can have twinned	I can have been twinning
you can have been twinning
she can have been twinning
we can have been twinning
you can have been twinning
they can have been twinning	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I cannot twin
you cannot twin
she cannot twin
we cannot twin
you cannot twin
they cannot twin 	I cannot be twinning
you cannot be twinning
she cannot be twinning
we cannot be twinning
you cannot be twinning
they cannot be twinning	I cannot have twinned
you cannot have twinned
she cannot have twinned
we cannot have twinned
you cannot have twinned
they cannot have twinned	I cannot have been twinning
you cannot have been twinning
she cannot have been twinning
we cannot have been twinning
you cannot have been twinning
they cannot have been twinning	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
can I twin?
can you twin?
can she twin?
can we twin?
can you twin?
can they twin? 	can I be twinning?
can you be twinning?
can she be twinning?
can we be twinning?
can you be twinning?
can they be twinning? 	can I have twinned?
can you have twinned?
can she have twinned?
can we have twinned?
can you have twinned?
can they have twinned? 	can I have been twinning?
can you have been twinning?
can she have been twinning?
can we have been twinning?
can you have been twinning?
can they have been twinning? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
can I not twin?
can you not twin?
can she not twin?
can we not twin?
can you not twin?
can they not twin? 	can I not be twinning?
can you not be twinning?
can she not be twinning?
can we not be twinning?
can you not be twinning?
can they not be twinning? 	can I not have twinned?
can you not have twinned?
can she not have twinned?
can we not have twinned?
can you not have twinned?
can they not have twinned? 	can I not have been twinning?
can you not have been twinning?
can she not have been twinning?
can we not have been twinning?
can you not have been twinning?
can they not have been twinning?