must giggle
Verbo regular: giggle - giggled- giggled

Afirmação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
I must giggle
you must giggle
she must giggle
we must giggle
you must giggle
they must giggle 	I must be giggling
you must be giggling
she must be giggling
we must be giggling
you must be giggling
they must be giggling	I must have giggled
you must have giggled
she must have giggled
we must have giggled
you must have giggled
they must have giggled	I must have been giggling
you must have been giggling
she must have been giggling
we must have been giggling
you must have been giggling
they must have been giggling	

Negação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
I must not giggle
you must not giggle
she must not giggle
we must not giggle
you must not giggle
they must not giggle 	I must not be giggling
you must not be giggling
she must not be giggling
we must not be giggling
you must not be giggling
they must not be giggling	I must not have giggled
you must not have giggled
she must not have giggled
we must not have giggled
you must not have giggled
they must not have giggled	I must not have been giggling
you must not have been giggling
she must not have been giggling
we must not have been giggling
you must not have been giggling
they must not have been giggling	

Forma interrogativa 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
must I giggle?
must you giggle?
must she giggle?
must we giggle?
must you giggle?
must they giggle? 	must I be giggling?
must you be giggling?
must she be giggling?
must we be giggling?
must you be giggling?
must they be giggling? 	must I have giggled?
must you have giggled?
must she have giggled?
must we have giggled?
must you have giggled?
must they have giggled? 	must I have been giggling?
must you have been giggling?
must she have been giggling?
must we have been giggling?
must you have been giggling?
must they have been giggling? 	

Forma interro-Negação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
must I not giggle?
must you not giggle?
must she not giggle?
must we not giggle?
must you not giggle?
must they not giggle? 	must I not be giggling?
must you not be giggling?
must she not be giggling?
must we not be giggling?
must you not be giggling?
must they not be giggling? 	must I not have giggled?
must you not have giggled?
must she not have giggled?
must we not have giggled?
must you not have giggled?
must they not have giggled? 	must I not have been giggling?
must you not have been giggling?
must she not have been giggling?
must we not have been giggling?
must you not have been giggling?
must they not have been giggling?