English verb conjugation
SHOULD UNDO

Irregular verb: undo - undid - undone

Affirmation

Simple form	V-ing form
I should undo you should undo he should undo we should undo you should undo they should undo	I should be undoing you should be undoing he should be undoing we should be undoing you should be undoing they should be undoing
Perfect	V-ing perfect
I should have undone you should have undone he should have undone we should have undone you should have undone they should have undone	I should have been undoing you should have been undoing he should have been undoing we should have been undoing you should have been undoing they should have been undoing

Negation

Simple form	V-ing form
I should not undo you should not undo he should not undo we should not undo you should not undo they should not undo	I should not be undoing you should not be undoing he should not be undoing we should not be undoing you should not be undoing they should not be undoing
Perfect	V-ing perfect
I should not have undone you should not have undone he should not have undone we should not have undone you should not have undone they should not have undone	I should not have been undoing you should not have been undoing he should not have been undoing we should not have been undoing you should not have been undoing they should not have been undoing

Interrogative form

Simple form	V-ing form
should I undo? should you undo? should he undo? should we undo? should you undo? should they undo?	should I be undoing? should you be undoing? should he be undoing? should we be undoing? should you be undoing? should they be undoing?
Perfect	V-ing perfect
should I have undone? should you have undone? should he have undone? should we have undone? should you have undone? should they have undone?	should I have been undoing? should you have been undoing? should he have been undoing? should we have been undoing? should you have been undoing? should they have been undoing?

Interro-negative form

Simple form	V-ing form
should I not undo? should you not undo? should he not undo? should we not undo? should you not undo? should they not undo?	should I not be undoing? should you not be undoing? should he not be undoing? should we not be undoing? should you not be undoing? should they not be undoing?
Perfect	V-ing perfect
should I not have undone? should you not have undone? should he not have undone? should we not have undone? should you not have undone? should they not have undone?	should I not have been undoing? should you not have been undoing? should he not have been undoing? should we not have been undoing? should you not have been undoing? should they not have been undoing?