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

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

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I should not high-grade
you should not high-grade
she should not high-grade
we should not high-grade
you should not high-grade
they should not high-grade 	I should not be high-grading
you should not be high-grading
she should not be high-grading
we should not be high-grading
you should not be high-grading
they should not be high-grading	I should not have high-graded
you should not have high-graded
she should not have high-graded
we should not have high-graded
you should not have high-graded
they should not have high-graded	I should not have been high-grading
you should not have been high-grading
she should not have been high-grading
we should not have been high-grading
you should not have been high-grading
they should not 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 	
should I not high-grade?
should you not high-grade?
should she not high-grade?
should we not high-grade?
should you not high-grade?
should they not high-grade? 	should I not be high-grading?
should you not be high-grading?
should she not be high-grading?
should we not be high-grading?
should you not be high-grading?
should they not be high-grading? 	should I not have high-graded?
should you not have high-graded?
should she not have high-graded?
should we not have high-graded?
should you not have high-graded?
should they not have high-graded? 	should I not have been high-grading?
should you not have been high-grading?
should she not have been high-grading?
should we not have been high-grading?
should you not have been high-grading?
should they not have been high-grading?