could high-grade
Verbe régulier : high-grade - high-graded- high-graded

Affirmation 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
I could high-grade
you could high-grade
she could high-grade
we could high-grade
you could high-grade
they could high-grade 	I could be high-grading
you could be high-grading
she could be high-grading
we could be high-grading
you could be high-grading
they could be high-grading	I could have high-graded
you could have high-graded
she could have high-graded
we could have high-graded
you could have high-graded
they could have high-graded	I could have been high-grading
you could have been high-grading
she could have been high-grading
we could have been high-grading
you could have been high-grading
they could have been high-grading	

Négation 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
I couldn't high-grade
you couldn't high-grade
she couldn't high-grade
we couldn't high-grade
you couldn't high-grade
they couldn't high-grade 	I couldn't be high-grading
you couldn't be high-grading
she couldn't be high-grading
we couldn't be high-grading
you couldn't be high-grading
they couldn't be high-grading	I couldn't have high-graded
you couldn't have high-graded
she couldn't have high-graded
we couldn't have high-graded
you couldn't have high-graded
they couldn't have high-graded	I couldn't have been high-grading
you couldn't have been high-grading
she couldn't have been high-grading
we couldn't have been high-grading
you couldn't have been high-grading
they couldn't have been high-grading	

Forme interrogative 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
could I high-grade?
could you high-grade?
could she high-grade?
could we high-grade?
could you high-grade?
could they high-grade? 	could I be high-grading?
could you be high-grading?
could she be high-grading?
could we be high-grading?
could you be high-grading?
could they be high-grading? 	could I have high-graded?
could you have high-graded?
could she have high-graded?
could we have high-graded?
could you have high-graded?
could they have high-graded? 	could I have been high-grading?
could you have been high-grading?
could she have been high-grading?
could we have been high-grading?
could you have been high-grading?
could they have been high-grading? 	

Forme interro-négative 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
couldn't I high-grade?
couldn't you high-grade?
couldn't she high-grade?
couldn't we high-grade?
couldn't you high-grade?
couldn't they high-grade? 	couldn't I be high-grading?
couldn't you be high-grading?
couldn't she be high-grading?
couldn't we be high-grading?
couldn't you be high-grading?
couldn't they be high-grading? 	couldn't I have high-graded?
couldn't you have high-graded?
couldn't she have high-graded?
couldn't we have high-graded?
couldn't you have high-graded?
couldn't they have high-graded? 	couldn't I have been high-grading?
couldn't you have been high-grading?
couldn't she have been high-grading?
couldn't we have been high-grading?
couldn't you have been high-grading?
couldn't they have been high-grading?