English verb conjugation
SHOULD THUMB

Regular verb: thumb - thumbed - thumbed

Affirmation

Simple form	V-ing form
I should thumb you should thumb she should thumb we should thumb you should thumb they should thumb	I should be thumbing you should be thumbing she should be thumbing we should be thumbing you should be thumbing they should be thumbing
Perfect	V-ing perfect
I should have thumbed you should have thumbed she should have thumbed we should have thumbed you should have thumbed they should have thumbed	I should have been thumbing you should have been thumbing she should have been thumbing we should have been thumbing you should have been thumbing they should have been thumbing

Negation

Simple form	V-ing form
I should not thumb you should not thumb she should not thumb we should not thumb you should not thumb they should not thumb	I should not be thumbing you should not be thumbing she should not be thumbing we should not be thumbing you should not be thumbing they should not be thumbing
Perfect	V-ing perfect
I should not have thumbed you should not have thumbed she should not have thumbed we should not have thumbed you should not have thumbed they should not have thumbed	I should not have been thumbing you should not have been thumbing she should not have been thumbing we should not have been thumbing you should not have been thumbing they should not have been thumbing

Interrogative form

Simple form	V-ing form
should I thumb? should you thumb? should she thumb? should we thumb? should you thumb? should they thumb?	should I be thumbing? should you be thumbing? should she be thumbing? should we be thumbing? should you be thumbing? should they be thumbing?
Perfect	V-ing perfect
should I have thumbed? should you have thumbed? should she have thumbed? should we have thumbed? should you have thumbed? should they have thumbed?	should I have been thumbing? should you have been thumbing? should she have been thumbing? should we have been thumbing? should you have been thumbing? should they have been thumbing?

Interro-negative form

Simple form	V-ing form
should I not thumb? should you not thumb? should she not thumb? should we not thumb? should you not thumb? should they not thumb?	should I not be thumbing? should you not be thumbing? should she not be thumbing? should we not be thumbing? should you not be thumbing? should they not be thumbing?
Perfect	V-ing perfect
should I not have thumbed? should you not have thumbed? should she not have thumbed? should we not have thumbed? should you not have thumbed? should they not have thumbed?	should I not have been thumbing? should you not have been thumbing? should she not have been thumbing? should we not have been thumbing? should you not have been thumbing? should they not have been thumbing?