should twin
Regular verb: twin - twinned- twinned

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

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

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

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