English verb conjugation
MAY CRUMBLE

Regular verb: crumble - crumbled - crumbled

Affirmation

Simple form	V-ing form
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
Perfect	V-ing perfect
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

Negation

Simple form	V-ing form
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
Perfect	V-ing perfect
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

Interrogative form

Simple form	V-ing form
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?
Perfect	V-ing perfect
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?

Interro-negative form

Simple form	V-ing form
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?
Perfect	V-ing perfect
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?