English verb conjugation
MUST SIMPER

Regular verb: simper - simpered - simpered

Affirmation

Simple form	V-ing form
I must simper you must simper she must simper we must simper you must simper they must simper	I must be simpering you must be simpering she must be simpering we must be simpering you must be simpering they must be simpering
Perfect	V-ing perfect
I must have simpered you must have simpered she must have simpered we must have simpered you must have simpered they must have simpered	I must have been simpering you must have been simpering she must have been simpering we must have been simpering you must have been simpering they must have been simpering

Negation

Simple form	V-ing form
I must not simper you must not simper she must not simper we must not simper you must not simper they must not simper	I must not be simpering you must not be simpering she must not be simpering we must not be simpering you must not be simpering they must not be simpering
Perfect	V-ing perfect
I must not have simpered you must not have simpered she must not have simpered we must not have simpered you must not have simpered they must not have simpered	I must not have been simpering you must not have been simpering she must not have been simpering we must not have been simpering you must not have been simpering they must not have been simpering

Interrogative form

Simple form	V-ing form
must I simper? must you simper? must she simper? must we simper? must you simper? must they simper?	must I be simpering? must you be simpering? must she be simpering? must we be simpering? must you be simpering? must they be simpering?
Perfect	V-ing perfect
must I have simpered? must you have simpered? must she have simpered? must we have simpered? must you have simpered? must they have simpered?	must I have been simpering? must you have been simpering? must she have been simpering? must we have been simpering? must you have been simpering? must they have been simpering?

Interro-negative form

Simple form	V-ing form
must I not simper? must you not simper? must she not simper? must we not simper? must you not simper? must they not simper?	must I not be simpering? must you not be simpering? must she not be simpering? must we not be simpering? must you not be simpering? must they not be simpering?
Perfect	V-ing perfect
must I not have simpered? must you not have simpered? must she not have simpered? must we not have simpered? must you not have simpered? must they not have simpered?	must I not have been simpering? must you not have been simpering? must she not have been simpering? must we not have been simpering? must you not have been simpering? must they not have been simpering?