English verb conjugation
MUST VEIN

Regular verb: vein - veined - veined

Affirmation

Simple form	V-ing form
I must vein you must vein he must vein we must vein you must vein they must vein	I must be veining you must be veining he must be veining we must be veining you must be veining they must be veining
Perfect	V-ing perfect
I must have veined you must have veined he must have veined we must have veined you must have veined they must have veined	I must have been veining you must have been veining he must have been veining we must have been veining you must have been veining they must have been veining

Negation

Simple form	V-ing form
I mustn't vein you mustn't vein he mustn't vein we mustn't vein you mustn't vein they mustn't vein	I mustn't be veining you mustn't be veining he mustn't be veining we mustn't be veining you mustn't be veining they mustn't be veining
Perfect	V-ing perfect
I mustn't have veined you mustn't have veined he mustn't have veined we mustn't have veined you mustn't have veined they mustn't have veined	I mustn't have been veining you mustn't have been veining he mustn't have been veining we mustn't have been veining you mustn't have been veining they mustn't have been veining

Interrogative form

Simple form	V-ing form
must I vein? must you vein? must he vein? must we vein? must you vein? must they vein?	must I be veining? must you be veining? must he be veining? must we be veining? must you be veining? must they be veining?
Perfect	V-ing perfect
must I have veined? must you have veined? must he have veined? must we have veined? must you have veined? must they have veined?	must I have been veining? must you have been veining? must he have been veining? must we have been veining? must you have been veining? must they have been veining?

Interro-negative form

Simple form	V-ing form
mustn't I vein? mustn't you vein? mustn't he vein? mustn't we vein? mustn't you vein? mustn't they vein?	mustn't I be veining? mustn't you be veining? mustn't he be veining? mustn't we be veining? mustn't you be veining? mustn't they be veining?
Perfect	V-ing perfect
mustn't I have veined? mustn't you have veined? mustn't he have veined? mustn't we have veined? mustn't you have veined? mustn't they have veined?	mustn't I have been veining? mustn't you have been veining? mustn't he have been veining? mustn't we have been veining? mustn't you have been veining? mustn't they have been veining?