must estivate
Verbo regular: estivate - estivated- estivated

Afirmação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
I must estivate
you must estivate
he must estivate
we must estivate
you must estivate
they must estivate 	I must be estivating
you must be estivating
he must be estivating
we must be estivating
you must be estivating
they must be estivating	I must have estivated
you must have estivated
he must have estivated
we must have estivated
you must have estivated
they must have estivated	I must have been estivating
you must have been estivating
he must have been estivating
we must have been estivating
you must have been estivating
they must have been estivating	

Negação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
I must not estivate
you must not estivate
he must not estivate
we must not estivate
you must not estivate
they must not estivate 	I must not be estivating
you must not be estivating
he must not be estivating
we must not be estivating
you must not be estivating
they must not be estivating	I must not have estivated
you must not have estivated
he must not have estivated
we must not have estivated
you must not have estivated
they must not have estivated	I must not have been estivating
you must not have been estivating
he must not have been estivating
we must not have been estivating
you must not have been estivating
they must not have been estivating	

Forma interrogativa 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
must I estivate?
must you estivate?
must he estivate?
must we estivate?
must you estivate?
must they estivate? 	must I be estivating?
must you be estivating?
must he be estivating?
must we be estivating?
must you be estivating?
must they be estivating? 	must I have estivated?
must you have estivated?
must he have estivated?
must we have estivated?
must you have estivated?
must they have estivated? 	must I have been estivating?
must you have been estivating?
must he have been estivating?
must we have been estivating?
must you have been estivating?
must they have been estivating? 	

Forma interro-Negação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
must I not estivate?
must you not estivate?
must he not estivate?
must we not estivate?
must you not estivate?
must they not estivate? 	must I not be estivating?
must you not be estivating?
must he not be estivating?
must we not be estivating?
must you not be estivating?
must they not be estivating? 	must I not have estivated?
must you not have estivated?
must he not have estivated?
must we not have estivated?
must you not have estivated?
must they not have estivated? 	must I not have been estivating?
must you not have been estivating?
must he not have been estivating?
must we not have been estivating?
must you not have been estivating?
must they not have been estivating?