must ingrain
Verbo regular: ingrain - ingrained- ingrained

Afirmação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
I must ingrain
you must ingrain
he must ingrain
we must ingrain
you must ingrain
they must ingrain 	I must be ingraining
you must be ingraining
he must be ingraining
we must be ingraining
you must be ingraining
they must be ingraining	I must have ingrained
you must have ingrained
he 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
he must have been ingraining
we must have been ingraining
you must have been ingraining
they must have been ingraining	

Negação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
I must not ingrain
you must not ingrain
he must not ingrain
we must not ingrain
you must not ingrain
they must not ingrain 	I must not be ingraining
you must not be ingraining
he must not be ingraining
we must not be ingraining
you must not be ingraining
they must not be ingraining	I must not have ingrained
you must not have ingrained
he must not have ingrained
we must not have ingrained
you must not have ingrained
they must not have ingrained	I must not have been ingraining
you must not have been ingraining
he must not have been ingraining
we must not have been ingraining
you must not have been ingraining
they must not have been ingraining	

Forma interrogativa 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
must I ingrain?
must you ingrain?
must he ingrain?
must we ingrain?
must you ingrain?
must they ingrain? 	must I be ingraining?
must you be ingraining?
must he be ingraining?
must we be ingraining?
must you be ingraining?
must they be ingraining? 	must I have ingrained?
must you have ingrained?
must he 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 he have been ingraining?
must we have been ingraining?
must you have been ingraining?
must they have been ingraining? 	

Forma interro-Negação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
must I not ingrain?
must you not ingrain?
must he not ingrain?
must we not ingrain?
must you not ingrain?
must they not ingrain? 	must I not be ingraining?
must you not be ingraining?
must he not be ingraining?
must we not be ingraining?
must you not be ingraining?
must they not be ingraining? 	must I not have ingrained?
must you not have ingrained?
must he not have ingrained?
must we not have ingrained?
must you not have ingrained?
must they not have ingrained? 	must I not have been ingraining?
must you not have been ingraining?
must he not have been ingraining?
must we not have been ingraining?
must you not have been ingraining?
must they not have been ingraining?