English verb conjugation
MUST RESTACK

Regular verb: restack - restacked - restacked

Affirmation

Simple form	V-ing form
I must restack you must restack he must restack we must restack you must restack they must restack	I must be restacking you must be restacking he must be restacking we must be restacking you must be restacking they must be restacking
Perfect	V-ing perfect
I must have restacked you must have restacked he must have restacked we must have restacked you must have restacked they must have restacked	I must have been restacking you must have been restacking he must have been restacking we must have been restacking you must have been restacking they must have been restacking

Negation

Simple form	V-ing form
I mustn't restack you mustn't restack he mustn't restack we mustn't restack you mustn't restack they mustn't restack	I mustn't be restacking you mustn't be restacking he mustn't be restacking we mustn't be restacking you mustn't be restacking they mustn't be restacking
Perfect	V-ing perfect
I mustn't have restacked you mustn't have restacked he mustn't have restacked we mustn't have restacked you mustn't have restacked they mustn't have restacked	I mustn't have been restacking you mustn't have been restacking he mustn't have been restacking we mustn't have been restacking you mustn't have been restacking they mustn't have been restacking

Interrogative form

Simple form	V-ing form
must I restack? must you restack? must he restack? must we restack? must you restack? must they restack?	must I be restacking? must you be restacking? must he be restacking? must we be restacking? must you be restacking? must they be restacking?
Perfect	V-ing perfect
must I have restacked? must you have restacked? must he have restacked? must we have restacked? must you have restacked? must they have restacked?	must I have been restacking? must you have been restacking? must he have been restacking? must we have been restacking? must you have been restacking? must they have been restacking?

Interro-negative form

Simple form	V-ing form
mustn't I restack? mustn't you restack? mustn't he restack? mustn't we restack? mustn't you restack? mustn't they restack?	mustn't I be restacking? mustn't you be restacking? mustn't he be restacking? mustn't we be restacking? mustn't you be restacking? mustn't they be restacking?
Perfect	V-ing perfect
mustn't I have restacked? mustn't you have restacked? mustn't he have restacked? mustn't we have restacked? mustn't you have restacked? mustn't they have restacked?	mustn't I have been restacking? mustn't you have been restacking? mustn't he have been restacking? mustn't we have been restacking? mustn't you have been restacking? mustn't they have been restacking?