must foster
Verbo regular: foster - fostered- fostered

Afirmação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
I must foster
you must foster
he must foster
we must foster
you must foster
they must foster 	I must be fostering
you must be fostering
he must be fostering
we must be fostering
you must be fostering
they must be fostering	I must have fostered
you must have fostered
he must have fostered
we must have fostered
you must have fostered
they must have fostered	I must have been fostering
you must have been fostering
he must have been fostering
we must have been fostering
you must have been fostering
they must have been fostering	

Negação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
I must not foster
you must not foster
he must not foster
we must not foster
you must not foster
they must not foster 	I must not be fostering
you must not be fostering
he must not be fostering
we must not be fostering
you must not be fostering
they must not be fostering	I must not have fostered
you must not have fostered
he must not have fostered
we must not have fostered
you must not have fostered
they must not have fostered	I must not have been fostering
you must not have been fostering
he must not have been fostering
we must not have been fostering
you must not have been fostering
they must not have been fostering	

Forma interrogativa 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
must I foster?
must you foster?
must he foster?
must we foster?
must you foster?
must they foster? 	must I be fostering?
must you be fostering?
must he be fostering?
must we be fostering?
must you be fostering?
must they be fostering? 	must I have fostered?
must you have fostered?
must he have fostered?
must we have fostered?
must you have fostered?
must they have fostered? 	must I have been fostering?
must you have been fostering?
must he have been fostering?
must we have been fostering?
must you have been fostering?
must they have been fostering? 	

Forma interro-Negação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
must I not foster?
must you not foster?
must he not foster?
must we not foster?
must you not foster?
must they not foster? 	must I not be fostering?
must you not be fostering?
must he not be fostering?
must we not be fostering?
must you not be fostering?
must they not be fostering? 	must I not have fostered?
must you not have fostered?
must he not have fostered?
must we not have fostered?
must you not have fostered?
must they not have fostered? 	must I not have been fostering?
must you not have been fostering?
must he not have been fostering?
must we not have been fostering?
must you not have been fostering?
must they not have been fostering?