must spark
Verbo regular: spark - sparked- sparked

Afirmação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
I must spark
you must spark
he must spark
we must spark
you must spark
they must spark 	I must be sparking
you must be sparking
he must be sparking
we must be sparking
you must be sparking
they must be sparking	I must have sparked
you must have sparked
he must have sparked
we must have sparked
you must have sparked
they must have sparked	I must have been sparking
you must have been sparking
he must have been sparking
we must have been sparking
you must have been sparking
they must have been sparking	

Negação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
I must not spark
you must not spark
he must not spark
we must not spark
you must not spark
they must not spark 	I must not be sparking
you must not be sparking
he must not be sparking
we must not be sparking
you must not be sparking
they must not be sparking	I must not have sparked
you must not have sparked
he must not have sparked
we must not have sparked
you must not have sparked
they must not have sparked	I must not have been sparking
you must not have been sparking
he must not have been sparking
we must not have been sparking
you must not have been sparking
they must not have been sparking	

Forma interrogativa 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
must I spark?
must you spark?
must he spark?
must we spark?
must you spark?
must they spark? 	must I be sparking?
must you be sparking?
must he be sparking?
must we be sparking?
must you be sparking?
must they be sparking? 	must I have sparked?
must you have sparked?
must he have sparked?
must we have sparked?
must you have sparked?
must they have sparked? 	must I have been sparking?
must you have been sparking?
must he have been sparking?
must we have been sparking?
must you have been sparking?
must they have been sparking? 	

Forma interro-Negação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
must I not spark?
must you not spark?
must he not spark?
must we not spark?
must you not spark?
must they not spark? 	must I not be sparking?
must you not be sparking?
must he not be sparking?
must we not be sparking?
must you not be sparking?
must they not be sparking? 	must I not have sparked?
must you not have sparked?
must he not have sparked?
must we not have sparked?
must you not have sparked?
must they not have sparked? 	must I not have been sparking?
must you not have been sparking?
must he not have been sparking?
must we not have been sparking?
must you not have been sparking?
must they not have been sparking?