I may tamper you may tamper she may tamper we may tamper you may tamper they may tamper
V-ing form
I may be tampering you may be tampering she may be tampering we may be tampering you may be tampering they may be tampering
Perfect
I may have tampered you may have tampered she may have tampered we may have tampered you may have tampered they may have tampered
V-ing perfect
I may have been tampering you may have been tampering she may have been tampering we may have been tampering you may have been tampering they may have been tampering
Negation
Simple form
I may not tamper you may not tamper she may not tamper we may not tamper you may not tamper they may not tamper
V-ing form
I may not be tampering you may not be tampering she may not be tampering we may not be tampering you may not be tampering they may not be tampering
Perfect
I may not have tampered you may not have tampered she may not have tampered we may not have tampered you may not have tampered they may not have tampered
V-ing perfect
I may not have been tampering you may not have been tampering she may not have been tampering we may not have been tampering you may not have been tampering they may not have been tampering
Interrogative form
Simple form
may I tamper? may you tamper? may she tamper? may we tamper? may you tamper? may they tamper?
V-ing form
may I be tampering? may you be tampering? may she be tampering? may we be tampering? may you be tampering? may they be tampering?
Perfect
may I have tampered? may you have tampered? may she have tampered? may we have tampered? may you have tampered? may they have tampered?
V-ing perfect
may I have been tampering? may you have been tampering? may she have been tampering? may we have been tampering? may you have been tampering? may they have been tampering?
Interro-negative form
Simple form
may I not tamper? may you not tamper? may she not tamper? may we not tamper? may you not tamper? may they not tamper?
V-ing form
may I not be tampering? may you not be tampering? may she not be tampering? may we not be tampering? may you not be tampering? may they not be tampering?
Perfect
may I not have tampered? may you not have tampered? may she not have tampered? may we not have tampered? may you not have tampered? may they not have tampered?
V-ing perfect
may I not have been tampering? may you not have been tampering? may she not have been tampering? may we not have been tampering? may you not have been tampering? may they not have been tampering?