must skirl
Verbo regular: skirl - skirled- skirled

Afirmação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
I must skirl
you must skirl
she must skirl
we must skirl
you must skirl
they must skirl 	I must be skirling
you must be skirling
she must be skirling
we must be skirling
you must be skirling
they must be skirling	I must have skirled
you must have skirled
she must have skirled
we must have skirled
you must have skirled
they must have skirled	I must have been skirling
you must have been skirling
she must have been skirling
we must have been skirling
you must have been skirling
they must have been skirling	

Negação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
I mustn't skirl
you mustn't skirl
she mustn't skirl
we mustn't skirl
you mustn't skirl
they mustn't skirl 	I mustn't be skirling
you mustn't be skirling
she mustn't be skirling
we mustn't be skirling
you mustn't be skirling
they mustn't be skirling	I mustn't have skirled
you mustn't have skirled
she mustn't have skirled
we mustn't have skirled
you mustn't have skirled
they mustn't have skirled	I mustn't have been skirling
you mustn't have been skirling
she mustn't have been skirling
we mustn't have been skirling
you mustn't have been skirling
they mustn't have been skirling	

Forma interrogativa 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
must I skirl?
must you skirl?
must she skirl?
must we skirl?
must you skirl?
must they skirl? 	must I be skirling?
must you be skirling?
must she be skirling?
must we be skirling?
must you be skirling?
must they be skirling? 	must I have skirled?
must you have skirled?
must she have skirled?
must we have skirled?
must you have skirled?
must they have skirled? 	must I have been skirling?
must you have been skirling?
must she have been skirling?
must we have been skirling?
must you have been skirling?
must they have been skirling? 	

Forma interro-Negação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
mustn't I skirl?
mustn't you skirl?
mustn't she skirl?
mustn't we skirl?
mustn't you skirl?
mustn't they skirl? 	mustn't I be skirling?
mustn't you be skirling?
mustn't she be skirling?
mustn't we be skirling?
mustn't you be skirling?
mustn't they be skirling? 	mustn't I have skirled?
mustn't you have skirled?
mustn't she have skirled?
mustn't we have skirled?
mustn't you have skirled?
mustn't they have skirled? 	mustn't I have been skirling?
mustn't you have been skirling?
mustn't she have been skirling?
mustn't we have been skirling?
mustn't you have been skirling?
mustn't they have been skirling?