I may preinvestigate you may preinvestigate she may preinvestigate we may preinvestigate you may preinvestigate they may preinvestigate
V-ing form
I may be preinvestigating you may be preinvestigating she may be preinvestigating we may be preinvestigating you may be preinvestigating they may be preinvestigating
Perfect
I may have preinvestigated you may have preinvestigated she may have preinvestigated we may have preinvestigated you may have preinvestigated they may have preinvestigated
V-ing perfect
I may have been preinvestigating you may have been preinvestigating she may have been preinvestigating we may have been preinvestigating you may have been preinvestigating they may have been preinvestigating
Negation
Simple form
I may not preinvestigate you may not preinvestigate she may not preinvestigate we may not preinvestigate you may not preinvestigate they may not preinvestigate
V-ing form
I may not be preinvestigating you may not be preinvestigating she may not be preinvestigating we may not be preinvestigating you may not be preinvestigating they may not be preinvestigating
Perfect
I may not have preinvestigated you may not have preinvestigated she may not have preinvestigated we may not have preinvestigated you may not have preinvestigated they may not have preinvestigated
V-ing perfect
I may not have been preinvestigating you may not have been preinvestigating she may not have been preinvestigating we may not have been preinvestigating you may not have been preinvestigating they may not have been preinvestigating
Interrogative form
Simple form
may I preinvestigate? may you preinvestigate? may she preinvestigate? may we preinvestigate? may you preinvestigate? may they preinvestigate?
V-ing form
may I be preinvestigating? may you be preinvestigating? may she be preinvestigating? may we be preinvestigating? may you be preinvestigating? may they be preinvestigating?
Perfect
may I have preinvestigated? may you have preinvestigated? may she have preinvestigated? may we have preinvestigated? may you have preinvestigated? may they have preinvestigated?
V-ing perfect
may I have been preinvestigating? may you have been preinvestigating? may she have been preinvestigating? may we have been preinvestigating? may you have been preinvestigating? may they have been preinvestigating?
Interro-negative form
Simple form
may I not preinvestigate? may you not preinvestigate? may she not preinvestigate? may we not preinvestigate? may you not preinvestigate? may they not preinvestigate?
V-ing form
may I not be preinvestigating? may you not be preinvestigating? may she not be preinvestigating? may we not be preinvestigating? may you not be preinvestigating? may they not be preinvestigating?
Perfect
may I not have preinvestigated? may you not have preinvestigated? may she not have preinvestigated? may we not have preinvestigated? may you not have preinvestigated? may they not have preinvestigated?
V-ing perfect
may I not have been preinvestigating? may you not have been preinvestigating? may she not have been preinvestigating? may we not have been preinvestigating? may you not have been preinvestigating? may they not have been preinvestigating?