may crumble
Verbo regular: crumble - crumbled- crumbled

Afirmação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
I may crumble
you may crumble
he may crumble
we may crumble
you may crumble
they may crumble 	I may be crumbling
you may be crumbling
he may be crumbling
we may be crumbling
you may be crumbling
they may be crumbling	I may have crumbled
you may have crumbled
he may have crumbled
we may have crumbled
you may have crumbled
they may have crumbled	I may have been crumbling
you may have been crumbling
he may have been crumbling
we may have been crumbling
you may have been crumbling
they may have been crumbling	

Negação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
I mayn't crumble
you mayn't crumble
he mayn't crumble
we mayn't crumble
you mayn't crumble
they mayn't crumble 	I mayn't be crumbling
you mayn't be crumbling
he mayn't be crumbling
we mayn't be crumbling
you mayn't be crumbling
they mayn't be crumbling	I mayn't have crumbled
you mayn't have crumbled
he mayn't have crumbled
we mayn't have crumbled
you mayn't have crumbled
they mayn't have crumbled	I mayn't have been crumbling
you mayn't have been crumbling
he mayn't have been crumbling
we mayn't have been crumbling
you mayn't have been crumbling
they mayn't have been crumbling	

Forma interrogativa 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
may I crumble?
may you crumble?
may he crumble?
may we crumble?
may you crumble?
may they crumble? 	may I be crumbling?
may you be crumbling?
may he be crumbling?
may we be crumbling?
may you be crumbling?
may they be crumbling? 	may I have crumbled?
may you have crumbled?
may he have crumbled?
may we have crumbled?
may you have crumbled?
may they have crumbled? 	may I have been crumbling?
may you have been crumbling?
may he have been crumbling?
may we have been crumbling?
may you have been crumbling?
may they have been crumbling? 	

Forma interro-Negação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
mayn't I crumble?
mayn't you crumble?
mayn't he crumble?
mayn't we crumble?
mayn't you crumble?
mayn't they crumble? 	mayn't I be crumbling?
mayn't you be crumbling?
mayn't he be crumbling?
mayn't we be crumbling?
mayn't you be crumbling?
mayn't they be crumbling? 	mayn't I have crumbled?
mayn't you have crumbled?
mayn't he have crumbled?
mayn't we have crumbled?
mayn't you have crumbled?
mayn't they have crumbled? 	mayn't I have been crumbling?
mayn't you have been crumbling?
mayn't he have been crumbling?
mayn't we have been crumbling?
mayn't you have been crumbling?
mayn't they have been crumbling?