must rat
Verbo regular: rat - ratted- ratted

Afirmação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
I must rat
you must rat
he must rat
we must rat
you must rat
they must rat 	I must be ratting
you must be ratting
he must be ratting
we must be ratting
you must be ratting
they must be ratting	I must have ratted
you must have ratted
he must have ratted
we must have ratted
you must have ratted
they must have ratted	I must have been ratting
you must have been ratting
he must have been ratting
we must have been ratting
you must have been ratting
they must have been ratting	

Negação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
I must not rat
you must not rat
he must not rat
we must not rat
you must not rat
they must not rat 	I must not be ratting
you must not be ratting
he must not be ratting
we must not be ratting
you must not be ratting
they must not be ratting	I must not have ratted
you must not have ratted
he must not have ratted
we must not have ratted
you must not have ratted
they must not have ratted	I must not have been ratting
you must not have been ratting
he must not have been ratting
we must not have been ratting
you must not have been ratting
they must not have been ratting	

Forma interrogativa 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
must I rat?
must you rat?
must he rat?
must we rat?
must you rat?
must they rat? 	must I be ratting?
must you be ratting?
must he be ratting?
must we be ratting?
must you be ratting?
must they be ratting? 	must I have ratted?
must you have ratted?
must he have ratted?
must we have ratted?
must you have ratted?
must they have ratted? 	must I have been ratting?
must you have been ratting?
must he have been ratting?
must we have been ratting?
must you have been ratting?
must they have been ratting? 	

Forma interro-Negação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
must I not rat?
must you not rat?
must he not rat?
must we not rat?
must you not rat?
must they not rat? 	must I not be ratting?
must you not be ratting?
must he not be ratting?
must we not be ratting?
must you not be ratting?
must they not be ratting? 	must I not have ratted?
must you not have ratted?
must he not have ratted?
must we not have ratted?
must you not have ratted?
must they not have ratted? 	must I not have been ratting?
must you not have been ratting?
must he not have been ratting?
must we not have been ratting?
must you not have been ratting?
must they not have been ratting?