English verb conjugation
MAY COUNTERVAIL

Regular verb: countervail - countervailed - countervailed

Affirmation

Simple form	V-ing form
I may countervail you may countervail he may countervail we may countervail you may countervail they may countervail	I may be countervailing you may be countervailing he may be countervailing we may be countervailing you may be countervailing they may be countervailing
Perfect	V-ing perfect
I may have countervailed you may have countervailed he may have countervailed we may have countervailed you may have countervailed they may have countervailed	I may have been countervailing you may have been countervailing he may have been countervailing we may have been countervailing you may have been countervailing they may have been countervailing

Negation

Simple form	V-ing form
I mayn't countervail you mayn't countervail he mayn't countervail we mayn't countervail you mayn't countervail they mayn't countervail	I mayn't be countervailing you mayn't be countervailing he mayn't be countervailing we mayn't be countervailing you mayn't be countervailing they mayn't be countervailing
Perfect	V-ing perfect
I mayn't have countervailed you mayn't have countervailed he mayn't have countervailed we mayn't have countervailed you mayn't have countervailed they mayn't have countervailed	I mayn't have been countervailing you mayn't have been countervailing he mayn't have been countervailing we mayn't have been countervailing you mayn't have been countervailing they mayn't have been countervailing

Interrogative form

Simple form	V-ing form
may I countervail? may you countervail? may he countervail? may we countervail? may you countervail? may they countervail?	may I be countervailing? may you be countervailing? may he be countervailing? may we be countervailing? may you be countervailing? may they be countervailing?
Perfect	V-ing perfect
may I have countervailed? may you have countervailed? may he have countervailed? may we have countervailed? may you have countervailed? may they have countervailed?	may I have been countervailing? may you have been countervailing? may he have been countervailing? may we have been countervailing? may you have been countervailing? may they have been countervailing?

Interro-negative form

Simple form	V-ing form
mayn't I countervail? mayn't you countervail? mayn't he countervail? mayn't we countervail? mayn't you countervail? mayn't they countervail?	mayn't I be countervailing? mayn't you be countervailing? mayn't he be countervailing? mayn't we be countervailing? mayn't you be countervailing? mayn't they be countervailing?
Perfect	V-ing perfect
mayn't I have countervailed? mayn't you have countervailed? mayn't he have countervailed? mayn't we have countervailed? mayn't you have countervailed? mayn't they have countervailed?	mayn't I have been countervailing? mayn't you have been countervailing? mayn't he have been countervailing? mayn't we have been countervailing? mayn't you have been countervailing? mayn't they have been countervailing?