I must discontinue you must discontinue she must discontinue we must discontinue you must discontinue they must discontinue
V-ing form
I must be discontinuing you must be discontinuing she must be discontinuing we must be discontinuing you must be discontinuing they must be discontinuing
Perfect
I must have discontinued you must have discontinued she must have discontinued we must have discontinued you must have discontinued they must have discontinued
V-ing perfect
I must have been discontinuing you must have been discontinuing she must have been discontinuing we must have been discontinuing you must have been discontinuing they must have been discontinuing
Negation
Simple form
I must not discontinue you must not discontinue she must not discontinue we must not discontinue you must not discontinue they must not discontinue
V-ing form
I must not be discontinuing you must not be discontinuing she must not be discontinuing we must not be discontinuing you must not be discontinuing they must not be discontinuing
Perfect
I must not have discontinued you must not have discontinued she must not have discontinued we must not have discontinued you must not have discontinued they must not have discontinued
V-ing perfect
I must not have been discontinuing you must not have been discontinuing she must not have been discontinuing we must not have been discontinuing you must not have been discontinuing they must not have been discontinuing
Interrogative form
Simple form
must I discontinue? must you discontinue? must she discontinue? must we discontinue? must you discontinue? must they discontinue?
V-ing form
must I be discontinuing? must you be discontinuing? must she be discontinuing? must we be discontinuing? must you be discontinuing? must they be discontinuing?
Perfect
must I have discontinued? must you have discontinued? must she have discontinued? must we have discontinued? must you have discontinued? must they have discontinued?
V-ing perfect
must I have been discontinuing? must you have been discontinuing? must she have been discontinuing? must we have been discontinuing? must you have been discontinuing? must they have been discontinuing?
Interro-negative form
Simple form
must I not discontinue? must you not discontinue? must she not discontinue? must we not discontinue? must you not discontinue? must they not discontinue?
V-ing form
must I not be discontinuing? must you not be discontinuing? must she not be discontinuing? must we not be discontinuing? must you not be discontinuing? must they not be discontinuing?
Perfect
must I not have discontinued? must you not have discontinued? must she not have discontinued? must we not have discontinued? must you not have discontinued? must they not have discontinued?
V-ing perfect
must I not have been discontinuing? must you not have been discontinuing? must she not have been discontinuing? must we not have been discontinuing? must you not have been discontinuing? must they not have been discontinuing?