English verb conjugation
MAY TUMBLE

Regular verb: tumble - tumbled - tumbled

Affirmation

Simple form	V-ing form
I may tumble you may tumble he may tumble we may tumble you may tumble they may tumble	I may be tumbling you may be tumbling he may be tumbling we may be tumbling you may be tumbling they may be tumbling
Perfect	V-ing perfect
I may have tumbled you may have tumbled he may have tumbled we may have tumbled you may have tumbled they may have tumbled	I may have been tumbling you may have been tumbling he may have been tumbling we may have been tumbling you may have been tumbling they may have been tumbling

Negation

Simple form	V-ing form
I may not tumble you may not tumble he may not tumble we may not tumble you may not tumble they may not tumble	I may not be tumbling you may not be tumbling he may not be tumbling we may not be tumbling you may not be tumbling they may not be tumbling
Perfect	V-ing perfect
I may not have tumbled you may not have tumbled he may not have tumbled we may not have tumbled you may not have tumbled they may not have tumbled	I may not have been tumbling you may not have been tumbling he may not have been tumbling we may not have been tumbling you may not have been tumbling they may not have been tumbling

Interrogative form

Simple form	V-ing form
may I tumble? may you tumble? may he tumble? may we tumble? may you tumble? may they tumble?	may I be tumbling? may you be tumbling? may he be tumbling? may we be tumbling? may you be tumbling? may they be tumbling?
Perfect	V-ing perfect
may I have tumbled? may you have tumbled? may he have tumbled? may we have tumbled? may you have tumbled? may they have tumbled?	may I have been tumbling? may you have been tumbling? may he have been tumbling? may we have been tumbling? may you have been tumbling? may they have been tumbling?

Interro-negative form

Simple form	V-ing form
may I not tumble? may you not tumble? may he not tumble? may we not tumble? may you not tumble? may they not tumble?	may I not be tumbling? may you not be tumbling? may he not be tumbling? may we not be tumbling? may you not be tumbling? may they not be tumbling?
Perfect	V-ing perfect
may I not have tumbled? may you not have tumbled? may he not have tumbled? may we not have tumbled? may you not have tumbled? may they not have tumbled?	may I not have been tumbling? may you not have been tumbling? may he not have been tumbling? may we not have been tumbling? may you not have been tumbling? may they not have been tumbling?