I must jail you must jail she must jail we must jail you must jail they must jail
V-ing form
I must be jailing you must be jailing she must be jailing we must be jailing you must be jailing they must be jailing
Perfect
I must have jailed you must have jailed she must have jailed we must have jailed you must have jailed they must have jailed
V-ing perfect
I must have been jailing you must have been jailing she must have been jailing we must have been jailing you must have been jailing they must have been jailing
Negation
Simple form
I must not jail you must not jail she must not jail we must not jail you must not jail they must not jail
V-ing form
I must not be jailing you must not be jailing she must not be jailing we must not be jailing you must not be jailing they must not be jailing
Perfect
I must not have jailed you must not have jailed she must not have jailed we must not have jailed you must not have jailed they must not have jailed
V-ing perfect
I must not have been jailing you must not have been jailing she must not have been jailing we must not have been jailing you must not have been jailing they must not have been jailing
Interrogative form
Simple form
must I jail? must you jail? must she jail? must we jail? must you jail? must they jail?
V-ing form
must I be jailing? must you be jailing? must she be jailing? must we be jailing? must you be jailing? must they be jailing?
Perfect
must I have jailed? must you have jailed? must she have jailed? must we have jailed? must you have jailed? must they have jailed?
V-ing perfect
must I have been jailing? must you have been jailing? must she have been jailing? must we have been jailing? must you have been jailing? must they have been jailing?
Interro-negative form
Simple form
must I not jail? must you not jail? must she not jail? must we not jail? must you not jail? must they not jail?
V-ing form
must I not be jailing? must you not be jailing? must she not be jailing? must we not be jailing? must you not be jailing? must they not be jailing?
Perfect
must I not have jailed? must you not have jailed? must she not have jailed? must we not have jailed? must you not have jailed? must they not have jailed?
V-ing perfect
must I not have been jailing? must you not have been jailing? must she not have been jailing? must we not have been jailing? must you not have been jailing? must they not have been jailing?