English verb conjugation
MAY PREINVESTIGATE

Regular verb: preinvestigate - preinvestigated - preinvestigated

Affirmation

Simple form	V-ing form
I may preinvestigate you may preinvestigate he may preinvestigate we may preinvestigate you may preinvestigate they may preinvestigate	I may be preinvestigating you may be preinvestigating he may be preinvestigating we may be preinvestigating you may be preinvestigating they may be preinvestigating
Perfect	V-ing perfect
I may have preinvestigated you may have preinvestigated he may have preinvestigated we may have preinvestigated you may have preinvestigated they may have preinvestigated	I may have been preinvestigating you may have been preinvestigating he may have been preinvestigating we may have been preinvestigating you may have been preinvestigating they may have been preinvestigating

Negation

Simple form	V-ing form
I mayn't preinvestigate you mayn't preinvestigate he mayn't preinvestigate we mayn't preinvestigate you mayn't preinvestigate they mayn't preinvestigate	I mayn't be preinvestigating you mayn't be preinvestigating he mayn't be preinvestigating we mayn't be preinvestigating you mayn't be preinvestigating they mayn't be preinvestigating
Perfect	V-ing perfect
I mayn't have preinvestigated you mayn't have preinvestigated he mayn't have preinvestigated we mayn't have preinvestigated you mayn't have preinvestigated they mayn't have preinvestigated	I mayn't have been preinvestigating you mayn't have been preinvestigating he mayn't have been preinvestigating we mayn't have been preinvestigating you mayn't have been preinvestigating they mayn't have been preinvestigating

Interrogative form

Simple form	V-ing form
may I preinvestigate? may you preinvestigate? may he preinvestigate? may we preinvestigate? may you preinvestigate? may they preinvestigate?	may I be preinvestigating? may you be preinvestigating? may he be preinvestigating? may we be preinvestigating? may you be preinvestigating? may they be preinvestigating?
Perfect	V-ing perfect
may I have preinvestigated? may you have preinvestigated? may he have preinvestigated? may we have preinvestigated? may you have preinvestigated? may they have preinvestigated?	may I have been preinvestigating? may you have been preinvestigating? may he have been preinvestigating? may we have been preinvestigating? may you have been preinvestigating? may they have been preinvestigating?

Interro-negative form

Simple form	V-ing form
mayn't I preinvestigate? mayn't you preinvestigate? mayn't he preinvestigate? mayn't we preinvestigate? mayn't you preinvestigate? mayn't they preinvestigate?	mayn't I be preinvestigating? mayn't you be preinvestigating? mayn't he be preinvestigating? mayn't we be preinvestigating? mayn't you be preinvestigating? mayn't they be preinvestigating?
Perfect	V-ing perfect
mayn't I have preinvestigated? mayn't you have preinvestigated? mayn't he have preinvestigated? mayn't we have preinvestigated? mayn't you have preinvestigated? mayn't they have preinvestigated?	mayn't I have been preinvestigating? mayn't you have been preinvestigating? mayn't he have been preinvestigating? mayn't we have been preinvestigating? mayn't you have been preinvestigating? mayn't they have been preinvestigating?