should high-grade
Regular verb: high-grade - high-graded- high-graded

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I'd high-grade
you'd high-grade
she'd high-grade
we'd high-grade
you'd high-grade
they'd high-grade 	I'd be high-grading
you'd be high-grading
she'd be high-grading
we'd be high-grading
you'd be high-grading
they'd be high-grading	I should've high-graded
you should've high-graded
she should've high-graded
we should've high-graded
you should've high-graded
they should've high-graded	I should've been high-grading
you should've been high-grading
she should've been high-grading
we should've been high-grading
you should've been high-grading
they should've been high-grading	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I shouldn't high-grade
you shouldn't high-grade
she shouldn't high-grade
we shouldn't high-grade
you shouldn't high-grade
they shouldn't high-grade 	I shouldn't be high-grading
you shouldn't be high-grading
she shouldn't be high-grading
we shouldn't be high-grading
you shouldn't be high-grading
they shouldn't be high-grading	I shouldn't have high-graded
you shouldn't have high-graded
she shouldn't have high-graded
we shouldn't have high-graded
you shouldn't have high-graded
they shouldn't have high-graded	I shouldn't have been high-grading
you shouldn't have been high-grading
she shouldn't have been high-grading
we shouldn't have been high-grading
you shouldn't have been high-grading
they shouldn't have been high-grading	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
should I high-grade?
should you high-grade?
should she high-grade?
should we high-grade?
should you high-grade?
should they high-grade? 	should I be high-grading?
should you be high-grading?
should she be high-grading?
should we be high-grading?
should you be high-grading?
should they be high-grading? 	should I have high-graded?
should you have high-graded?
should she have high-graded?
should we have high-graded?
should you have high-graded?
should they have high-graded? 	should I have been high-grading?
should you have been high-grading?
should she have been high-grading?
should we have been high-grading?
should you have been high-grading?
should they have been high-grading? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
shouldn't I high-grade?
shouldn't you high-grade?
shouldn't she high-grade?
shouldn't we high-grade?
shouldn't you high-grade?
shouldn't they high-grade? 	shouldn't I be high-grading?
shouldn't you be high-grading?
shouldn't she be high-grading?
shouldn't we be high-grading?
shouldn't you be high-grading?
shouldn't they be high-grading? 	shouldn't I have high-graded?
shouldn't you have high-graded?
shouldn't she have high-graded?
shouldn't we have high-graded?
shouldn't you have high-graded?
shouldn't they have high-graded? 	shouldn't I have been high-grading?
shouldn't you have been high-grading?
shouldn't she have been high-grading?
shouldn't we have been high-grading?
shouldn't you have been high-grading?
shouldn't they have been high-grading?