English verb conjugation
SHOULD CHANGE

Regular verb: change - changed - changed

Affirmation

Simple form	V-ing form
I'd change you'd change she'd change we'd change you'd change they'd change	I'd be changing you'd be changing she'd be changing we'd be changing you'd be changing they'd be changing
Perfect	V-ing perfect
I should've changed you should've changed she should've changed we should've changed you should've changed they should've changed	I should've been changing you should've been changing she should've been changing we should've been changing you should've been changing they should've been changing

Negation

Simple form	V-ing form
I shouldn't change you shouldn't change she shouldn't change we shouldn't change you shouldn't change they shouldn't change	I shouldn't be changing you shouldn't be changing she shouldn't be changing we shouldn't be changing you shouldn't be changing they shouldn't be changing
Perfect	V-ing perfect
I shouldn't have changed you shouldn't have changed she shouldn't have changed we shouldn't have changed you shouldn't have changed they shouldn't have changed	I shouldn't have been changing you shouldn't have been changing she shouldn't have been changing we shouldn't have been changing you shouldn't have been changing they shouldn't have been changing

Interrogative form

Simple form	V-ing form
should I change? should you change? should she change? should we change? should you change? should they change?	should I be changing? should you be changing? should she be changing? should we be changing? should you be changing? should they be changing?
Perfect	V-ing perfect
should I have changed? should you have changed? should she have changed? should we have changed? should you have changed? should they have changed?	should I have been changing? should you have been changing? should she have been changing? should we have been changing? should you have been changing? should they have been changing?

Interro-negative form

Simple form	V-ing form
shouldn't I change? shouldn't you change? shouldn't she change? shouldn't we change? shouldn't you change? shouldn't they change?	shouldn't I be changing? shouldn't you be changing? shouldn't she be changing? shouldn't we be changing? shouldn't you be changing? shouldn't they be changing?
Perfect	V-ing perfect
shouldn't I have changed? shouldn't you have changed? shouldn't she have changed? shouldn't we have changed? shouldn't you have changed? shouldn't they have changed?	shouldn't I have been changing? shouldn't you have been changing? shouldn't she have been changing? shouldn't we have been changing? shouldn't you have been changing? shouldn't they have been changing?