English verb conjugation
SHOULD TWIN

Regular verb: twin - twinned - twinned

Affirmation

Simple form	V-ing form
I'd twin you'd twin he'd twin we'd twin you'd twin they'd twin	I'd be twinning you'd be twinning he'd be twinning we'd be twinning you'd be twinning they'd be twinning
Perfect	V-ing perfect
I should've twinned you should've twinned he should've twinned we should've twinned you should've twinned they should've twinned	I should've been twinning you should've been twinning he should've been twinning we should've been twinning you should've been twinning they should've been twinning

Negation

Simple form	V-ing form
I shouldn't twin you shouldn't twin he shouldn't twin we shouldn't twin you shouldn't twin they shouldn't twin	I shouldn't be twinning you shouldn't be twinning he shouldn't be twinning we shouldn't be twinning you shouldn't be twinning they shouldn't be twinning
Perfect	V-ing perfect
I shouldn't have twinned you shouldn't have twinned he shouldn't have twinned we shouldn't have twinned you shouldn't have twinned they shouldn't have twinned	I shouldn't have been twinning you shouldn't have been twinning he shouldn't have been twinning we shouldn't have been twinning you shouldn't have been twinning they shouldn't have been twinning

Interrogative form

Simple form	V-ing form
should I twin? should you twin? should he twin? should we twin? should you twin? should they twin?	should I be twinning? should you be twinning? should he be twinning? should we be twinning? should you be twinning? should they be twinning?
Perfect	V-ing perfect
should I have twinned? should you have twinned? should he 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 he 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
shouldn't I twin? shouldn't you twin? shouldn't he twin? shouldn't we twin? shouldn't you twin? shouldn't they twin?	shouldn't I be twinning? shouldn't you be twinning? shouldn't he be twinning? shouldn't we be twinning? shouldn't you be twinning? shouldn't they be twinning?
Perfect	V-ing perfect
shouldn't I have twinned? shouldn't you have twinned? shouldn't he have twinned? shouldn't we have twinned? shouldn't you have twinned? shouldn't they have twinned?	shouldn't I have been twinning? shouldn't you have been twinning? shouldn't he have been twinning? shouldn't we have been twinning? shouldn't you have been twinning? shouldn't they have been twinning?