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 can't twin
you can't twin
she can't twin
we can't twin
you can't twin
they can't twin 	I can't be twinning
you can't be twinning
she can't be twinning
we can't be twinning
you can't be twinning
they can't be twinning	I can't have twinned
you can't have twinned
she can't have twinned
we can't have twinned
you can't have twinned
they can't have twinned	I can't have been twinning
you can't have been twinning
she can't have been twinning
we can't have been twinning
you can't have been twinning
they can't 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't I twin?
can't you twin?
can't she twin?
can't we twin?
can't you twin?
can't they twin? 	can't I be twinning?
can't you be twinning?
can't she be twinning?
can't we be twinning?
can't you be twinning?
can't they be twinning? 	can't I have twinned?
can't you have twinned?
can't she have twinned?
can't we have twinned?
can't you have twinned?
can't they have twinned? 	can't I have been twinning?
can't you have been twinning?
can't she have been twinning?
can't we have been twinning?
can't you have been twinning?
can't they have been twinning?