must ingrain
Verbe régulier : ingrain - ingrained- ingrained

Affirmation 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
I must ingrain
you must ingrain
she must ingrain
we must ingrain
you must ingrain
they must ingrain 	I must be ingraining
you must be ingraining
she must be ingraining
we must be ingraining
you must be ingraining
they must be ingraining	I must have ingrained
you must have ingrained
she must have ingrained
we must have ingrained
you must have ingrained
they must have ingrained	I must have been ingraining
you must have been ingraining
she must have been ingraining
we must have been ingraining
you must have been ingraining
they must have been ingraining	

Négation 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
I mustn't ingrain
you mustn't ingrain
she mustn't ingrain
we mustn't ingrain
you mustn't ingrain
they mustn't ingrain 	I mustn't be ingraining
you mustn't be ingraining
she mustn't be ingraining
we mustn't be ingraining
you mustn't be ingraining
they mustn't be ingraining	I mustn't have ingrained
you mustn't have ingrained
she mustn't have ingrained
we mustn't have ingrained
you mustn't have ingrained
they mustn't have ingrained	I mustn't have been ingraining
you mustn't have been ingraining
she mustn't have been ingraining
we mustn't have been ingraining
you mustn't have been ingraining
they mustn't have been ingraining	

Forme interrogative 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
must I ingrain?
must you ingrain?
must she ingrain?
must we ingrain?
must you ingrain?
must they ingrain? 	must I be ingraining?
must you be ingraining?
must she be ingraining?
must we be ingraining?
must you be ingraining?
must they be ingraining? 	must I have ingrained?
must you have ingrained?
must she have ingrained?
must we have ingrained?
must you have ingrained?
must they have ingrained? 	must I have been ingraining?
must you have been ingraining?
must she have been ingraining?
must we have been ingraining?
must you have been ingraining?
must they have been ingraining? 	

Forme interro-négative 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
mustn't I ingrain?
mustn't you ingrain?
mustn't she ingrain?
mustn't we ingrain?
mustn't you ingrain?
mustn't they ingrain? 	mustn't I be ingraining?
mustn't you be ingraining?
mustn't she be ingraining?
mustn't we be ingraining?
mustn't you be ingraining?
mustn't they be ingraining? 	mustn't I have ingrained?
mustn't you have ingrained?
mustn't she have ingrained?
mustn't we have ingrained?
mustn't you have ingrained?
mustn't they have ingrained? 	mustn't I have been ingraining?
mustn't you have been ingraining?
mustn't she have been ingraining?
mustn't we have been ingraining?
mustn't you have been ingraining?
mustn't they have been ingraining?