English verb conjugation
SHOULD TWIN

Regular verb: twin - twinned - twinned

Affirmation

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