should lemmatize
Regular verb: lemmatize - lemmatized- lemmatized

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I'd lemmatize
you'd lemmatize
she'd lemmatize
we'd lemmatize
you'd lemmatize
they'd lemmatize 	I'd be lemmatizing
you'd be lemmatizing
she'd be lemmatizing
we'd be lemmatizing
you'd be lemmatizing
they'd be lemmatizing	I should've lemmatized
you should've lemmatized
she should've lemmatized
we should've lemmatized
you should've lemmatized
they should've lemmatized	I should've been lemmatizing
you should've been lemmatizing
she should've been lemmatizing
we should've been lemmatizing
you should've been lemmatizing
they should've been lemmatizing	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I shouldn't lemmatize
you shouldn't lemmatize
she shouldn't lemmatize
we shouldn't lemmatize
you shouldn't lemmatize
they shouldn't lemmatize 	I shouldn't be lemmatizing
you shouldn't be lemmatizing
she shouldn't be lemmatizing
we shouldn't be lemmatizing
you shouldn't be lemmatizing
they shouldn't be lemmatizing	I shouldn't have lemmatized
you shouldn't have lemmatized
she shouldn't have lemmatized
we shouldn't have lemmatized
you shouldn't have lemmatized
they shouldn't have lemmatized	I shouldn't have been lemmatizing
you shouldn't have been lemmatizing
she shouldn't have been lemmatizing
we shouldn't have been lemmatizing
you shouldn't have been lemmatizing
they shouldn't have been lemmatizing	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
should I lemmatize?
should you lemmatize?
should she lemmatize?
should we lemmatize?
should you lemmatize?
should they lemmatize? 	should I be lemmatizing?
should you be lemmatizing?
should she be lemmatizing?
should we be lemmatizing?
should you be lemmatizing?
should they be lemmatizing? 	should I have lemmatized?
should you have lemmatized?
should she have lemmatized?
should we have lemmatized?
should you have lemmatized?
should they have lemmatized? 	should I have been lemmatizing?
should you have been lemmatizing?
should she have been lemmatizing?
should we have been lemmatizing?
should you have been lemmatizing?
should they have been lemmatizing? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
shouldn't I lemmatize?
shouldn't you lemmatize?
shouldn't she lemmatize?
shouldn't we lemmatize?
shouldn't you lemmatize?
shouldn't they lemmatize? 	shouldn't I be lemmatizing?
shouldn't you be lemmatizing?
shouldn't she be lemmatizing?
shouldn't we be lemmatizing?
shouldn't you be lemmatizing?
shouldn't they be lemmatizing? 	shouldn't I have lemmatized?
shouldn't you have lemmatized?
shouldn't she have lemmatized?
shouldn't we have lemmatized?
shouldn't you have lemmatized?
shouldn't they have lemmatized? 	shouldn't I have been lemmatizing?
shouldn't you have been lemmatizing?
shouldn't she have been lemmatizing?
shouldn't we have been lemmatizing?
shouldn't you have been lemmatizing?
shouldn't they have been lemmatizing?