must crinkle
Verbo regular: crinkle - crinkled- crinkled

Afirmação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
I must crinkle
you must crinkle
he must crinkle
we must crinkle
you must crinkle
they must crinkle 	I must be crinkling
you must be crinkling
he must be crinkling
we must be crinkling
you must be crinkling
they must be crinkling	I must have crinkled
you must have crinkled
he must have crinkled
we must have crinkled
you must have crinkled
they must have crinkled	I must have been crinkling
you must have been crinkling
he must have been crinkling
we must have been crinkling
you must have been crinkling
they must have been crinkling	

Negação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
I mustn't crinkle
you mustn't crinkle
he mustn't crinkle
we mustn't crinkle
you mustn't crinkle
they mustn't crinkle 	I mustn't be crinkling
you mustn't be crinkling
he mustn't be crinkling
we mustn't be crinkling
you mustn't be crinkling
they mustn't be crinkling	I mustn't have crinkled
you mustn't have crinkled
he mustn't have crinkled
we mustn't have crinkled
you mustn't have crinkled
they mustn't have crinkled	I mustn't have been crinkling
you mustn't have been crinkling
he mustn't have been crinkling
we mustn't have been crinkling
you mustn't have been crinkling
they mustn't have been crinkling	

Forma interrogativa 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
must I crinkle?
must you crinkle?
must he crinkle?
must we crinkle?
must you crinkle?
must they crinkle? 	must I be crinkling?
must you be crinkling?
must he be crinkling?
must we be crinkling?
must you be crinkling?
must they be crinkling? 	must I have crinkled?
must you have crinkled?
must he have crinkled?
must we have crinkled?
must you have crinkled?
must they have crinkled? 	must I have been crinkling?
must you have been crinkling?
must he have been crinkling?
must we have been crinkling?
must you have been crinkling?
must they have been crinkling? 	

Forma interro-Negação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
mustn't I crinkle?
mustn't you crinkle?
mustn't he crinkle?
mustn't we crinkle?
mustn't you crinkle?
mustn't they crinkle? 	mustn't I be crinkling?
mustn't you be crinkling?
mustn't he be crinkling?
mustn't we be crinkling?
mustn't you be crinkling?
mustn't they be crinkling? 	mustn't I have crinkled?
mustn't you have crinkled?
mustn't he have crinkled?
mustn't we have crinkled?
mustn't you have crinkled?
mustn't they have crinkled? 	mustn't I have been crinkling?
mustn't you have been crinkling?
mustn't he have been crinkling?
mustn't we have been crinkling?
mustn't you have been crinkling?
mustn't they have been crinkling?