English verb conjugation
CAN TAMPER

Regular verb: tamper - tampered - tampered

Affirmation

Simple form	V-ing form
I can tamper you can tamper he can tamper we can tamper you can tamper they can tamper	I can be tampering you can be tampering he can be tampering we can be tampering you can be tampering they can be tampering
Perfect	V-ing perfect
I can have tampered you can have tampered he can have tampered we can have tampered you can have tampered they can have tampered	I can have been tampering you can have been tampering he can have been tampering we can have been tampering you can have been tampering they can have been tampering

Negation

Simple form	V-ing form
I cannot tamper you cannot tamper he cannot tamper we cannot tamper you cannot tamper they cannot tamper	I cannot be tampering you cannot be tampering he cannot be tampering we cannot be tampering you cannot be tampering they cannot be tampering
Perfect	V-ing perfect
I cannot have tampered you cannot have tampered he cannot have tampered we cannot have tampered you cannot have tampered they cannot have tampered	I cannot have been tampering you cannot have been tampering he cannot have been tampering we cannot have been tampering you cannot have been tampering they cannot have been tampering

Interrogative form

Simple form	V-ing form
can I tamper? can you tamper? can he tamper? can we tamper? can you tamper? can they tamper?	can I be tampering? can you be tampering? can he be tampering? can we be tampering? can you be tampering? can they be tampering?
Perfect	V-ing perfect
can I have tampered? can you have tampered? can he have tampered? can we have tampered? can you have tampered? can they have tampered?	can I have been tampering? can you have been tampering? can he have been tampering? can we have been tampering? can you have been tampering? can they have been tampering?

Interro-negative form

Simple form	V-ing form
can I not tamper? can you not tamper? can he not tamper? can we not tamper? can you not tamper? can they not tamper?	can I not be tampering? can you not be tampering? can he not be tampering? can we not be tampering? can you not be tampering? can they not be tampering?
Perfect	V-ing perfect
can I not have tampered? can you not have tampered? can he not have tampered? can we not have tampered? can you not have tampered? can they not have tampered?	can I not have been tampering? can you not have been tampering? can he not have been tampering? can we not have been tampering? can you not have been tampering? can they not have been tampering?