English verb conjugation
MAY COUNTERCHECK

Regular verb: countercheck - counterchecked - counterchecked

Affirmation

Simple form	V-ing form
I may countercheck you may countercheck he may countercheck we may countercheck you may countercheck they may countercheck	I may be counterchecking you may be counterchecking he may be counterchecking we may be counterchecking you may be counterchecking they may be counterchecking
Perfect	V-ing perfect
I may have counterchecked you may have counterchecked he may have counterchecked we may have counterchecked you may have counterchecked they may have counterchecked	I may have been counterchecking you may have been counterchecking he may have been counterchecking we may have been counterchecking you may have been counterchecking they may have been counterchecking

Negation

Simple form	V-ing form
I mayn't countercheck you mayn't countercheck he mayn't countercheck we mayn't countercheck you mayn't countercheck they mayn't countercheck	I mayn't be counterchecking you mayn't be counterchecking he mayn't be counterchecking we mayn't be counterchecking you mayn't be counterchecking they mayn't be counterchecking
Perfect	V-ing perfect
I mayn't have counterchecked you mayn't have counterchecked he mayn't have counterchecked we mayn't have counterchecked you mayn't have counterchecked they mayn't have counterchecked	I mayn't have been counterchecking you mayn't have been counterchecking he mayn't have been counterchecking we mayn't have been counterchecking you mayn't have been counterchecking they mayn't have been counterchecking

Interrogative form

Simple form	V-ing form
may I countercheck? may you countercheck? may he countercheck? may we countercheck? may you countercheck? may they countercheck?	may I be counterchecking? may you be counterchecking? may he be counterchecking? may we be counterchecking? may you be counterchecking? may they be counterchecking?
Perfect	V-ing perfect
may I have counterchecked? may you have counterchecked? may he have counterchecked? may we have counterchecked? may you have counterchecked? may they have counterchecked?	may I have been counterchecking? may you have been counterchecking? may he have been counterchecking? may we have been counterchecking? may you have been counterchecking? may they have been counterchecking?

Interro-negative form

Simple form	V-ing form
mayn't I countercheck? mayn't you countercheck? mayn't he countercheck? mayn't we countercheck? mayn't you countercheck? mayn't they countercheck?	mayn't I be counterchecking? mayn't you be counterchecking? mayn't he be counterchecking? mayn't we be counterchecking? mayn't you be counterchecking? mayn't they be counterchecking?
Perfect	V-ing perfect
mayn't I have counterchecked? mayn't you have counterchecked? mayn't he have counterchecked? mayn't we have counterchecked? mayn't you have counterchecked? mayn't they have counterchecked?	mayn't I have been counterchecking? mayn't you have been counterchecking? mayn't he have been counterchecking? mayn't we have been counterchecking? mayn't you have been counterchecking? mayn't they have been counterchecking?