English verb conjugation
MAY PRECHECK

Regular verb: precheck - prechecked - prechecked

Affirmation

Simple form	V-ing form
I may precheck you may precheck he may precheck we may precheck you may precheck they may precheck	I may be prechecking you may be prechecking he may be prechecking we may be prechecking you may be prechecking they may be prechecking
Perfect	V-ing perfect
I may have prechecked you may have prechecked he may have prechecked we may have prechecked you may have prechecked they may have prechecked	I may have been prechecking you may have been prechecking he may have been prechecking we may have been prechecking you may have been prechecking they may have been prechecking

Negation

Simple form	V-ing form
I mayn't precheck you mayn't precheck he mayn't precheck we mayn't precheck you mayn't precheck they mayn't precheck	I mayn't be prechecking you mayn't be prechecking he mayn't be prechecking we mayn't be prechecking you mayn't be prechecking they mayn't be prechecking
Perfect	V-ing perfect
I mayn't have prechecked you mayn't have prechecked he mayn't have prechecked we mayn't have prechecked you mayn't have prechecked they mayn't have prechecked	I mayn't have been prechecking you mayn't have been prechecking he mayn't have been prechecking we mayn't have been prechecking you mayn't have been prechecking they mayn't have been prechecking

Interrogative form

Simple form	V-ing form
may I precheck? may you precheck? may he precheck? may we precheck? may you precheck? may they precheck?	may I be prechecking? may you be prechecking? may he be prechecking? may we be prechecking? may you be prechecking? may they be prechecking?
Perfect	V-ing perfect
may I have prechecked? may you have prechecked? may he have prechecked? may we have prechecked? may you have prechecked? may they have prechecked?	may I have been prechecking? may you have been prechecking? may he have been prechecking? may we have been prechecking? may you have been prechecking? may they have been prechecking?

Interro-negative form

Simple form	V-ing form
mayn't I precheck? mayn't you precheck? mayn't he precheck? mayn't we precheck? mayn't you precheck? mayn't they precheck?	mayn't I be prechecking? mayn't you be prechecking? mayn't he be prechecking? mayn't we be prechecking? mayn't you be prechecking? mayn't they be prechecking?
Perfect	V-ing perfect
mayn't I have prechecked? mayn't you have prechecked? mayn't he have prechecked? mayn't we have prechecked? mayn't you have prechecked? mayn't they have prechecked?	mayn't I have been prechecking? mayn't you have been prechecking? mayn't he have been prechecking? mayn't we have been prechecking? mayn't you have been prechecking? mayn't they have been prechecking?