English verb conjugation
MAY STUMBLE

Regular verb: stumble - stumbled - stumbled

Affirmation

Simple form	V-ing form
I may stumble you may stumble he may stumble we may stumble you may stumble they may stumble	I may be stumbling you may be stumbling he may be stumbling we may be stumbling you may be stumbling they may be stumbling
Perfect	V-ing perfect
I may have stumbled you may have stumbled he may have stumbled we may have stumbled you may have stumbled they may have stumbled	I may have been stumbling you may have been stumbling he may have been stumbling we may have been stumbling you may have been stumbling they may have been stumbling

Negation

Simple form	V-ing form
I mayn't stumble you mayn't stumble he mayn't stumble we mayn't stumble you mayn't stumble they mayn't stumble	I mayn't be stumbling you mayn't be stumbling he mayn't be stumbling we mayn't be stumbling you mayn't be stumbling they mayn't be stumbling
Perfect	V-ing perfect
I mayn't have stumbled you mayn't have stumbled he mayn't have stumbled we mayn't have stumbled you mayn't have stumbled they mayn't have stumbled	I mayn't have been stumbling you mayn't have been stumbling he mayn't have been stumbling we mayn't have been stumbling you mayn't have been stumbling they mayn't have been stumbling

Interrogative form

Simple form	V-ing form
may I stumble? may you stumble? may he stumble? may we stumble? may you stumble? may they stumble?	may I be stumbling? may you be stumbling? may he be stumbling? may we be stumbling? may you be stumbling? may they be stumbling?
Perfect	V-ing perfect
may I have stumbled? may you have stumbled? may he have stumbled? may we have stumbled? may you have stumbled? may they have stumbled?	may I have been stumbling? may you have been stumbling? may he have been stumbling? may we have been stumbling? may you have been stumbling? may they have been stumbling?

Interro-negative form

Simple form	V-ing form
mayn't I stumble? mayn't you stumble? mayn't he stumble? mayn't we stumble? mayn't you stumble? mayn't they stumble?	mayn't I be stumbling? mayn't you be stumbling? mayn't he be stumbling? mayn't we be stumbling? mayn't you be stumbling? mayn't they be stumbling?
Perfect	V-ing perfect
mayn't I have stumbled? mayn't you have stumbled? mayn't he have stumbled? mayn't we have stumbled? mayn't you have stumbled? mayn't they have stumbled?	mayn't I have been stumbling? mayn't you have been stumbling? mayn't he have been stumbling? mayn't we have been stumbling? mayn't you have been stumbling? mayn't they have been stumbling?