English verb conjugation
SHOULD UNDERTAIN

Regular verb: undertain - undertained - undertained

Affirmation

Simple form	V-ing form
I should undertain you should undertain he should undertain we should undertain you should undertain they should undertain	I should be undertaining you should be undertaining he should be undertaining we should be undertaining you should be undertaining they should be undertaining
Perfect	V-ing perfect
I should have undertained you should have undertained he should have undertained we should have undertained you should have undertained they should have undertained	I should have been undertaining you should have been undertaining he should have been undertaining we should have been undertaining you should have been undertaining they should have been undertaining

Negation

Simple form	V-ing form
I should not undertain you should not undertain he should not undertain we should not undertain you should not undertain they should not undertain	I should not be undertaining you should not be undertaining he should not be undertaining we should not be undertaining you should not be undertaining they should not be undertaining
Perfect	V-ing perfect
I should not have undertained you should not have undertained he should not have undertained we should not have undertained you should not have undertained they should not have undertained	I should not have been undertaining you should not have been undertaining he should not have been undertaining we should not have been undertaining you should not have been undertaining they should not have been undertaining

Interrogative form

Simple form	V-ing form
should I undertain? should you undertain? should he undertain? should we undertain? should you undertain? should they undertain?	should I be undertaining? should you be undertaining? should he be undertaining? should we be undertaining? should you be undertaining? should they be undertaining?
Perfect	V-ing perfect
should I have undertained? should you have undertained? should he have undertained? should we have undertained? should you have undertained? should they have undertained?	should I have been undertaining? should you have been undertaining? should he have been undertaining? should we have been undertaining? should you have been undertaining? should they have been undertaining?

Interro-negative form

Simple form	V-ing form
should I not undertain? should you not undertain? should he not undertain? should we not undertain? should you not undertain? should they not undertain?	should I not be undertaining? should you not be undertaining? should he not be undertaining? should we not be undertaining? should you not be undertaining? should they not be undertaining?
Perfect	V-ing perfect
should I not have undertained? should you not have undertained? should he not have undertained? should we not have undertained? should you not have undertained? should they not have undertained?	should I not have been undertaining? should you not have been undertaining? should he not have been undertaining? should we not have been undertaining? should you not have been undertaining? should they not have been undertaining?