English verb conjugation
MUST GROIN

Regular verb: groin - groined - groined

Affirmation

Simple form	V-ing form
I must groin you must groin he must groin we must groin you must groin they must groin	I must be groining you must be groining he must be groining we must be groining you must be groining they must be groining
Perfect	V-ing perfect
I must have groined you must have groined he must have groined we must have groined you must have groined they must have groined	I must have been groining you must have been groining he must have been groining we must have been groining you must have been groining they must have been groining

Negation

Simple form	V-ing form
I mustn't groin you mustn't groin he mustn't groin we mustn't groin you mustn't groin they mustn't groin	I mustn't be groining you mustn't be groining he mustn't be groining we mustn't be groining you mustn't be groining they mustn't be groining
Perfect	V-ing perfect
I mustn't have groined you mustn't have groined he mustn't have groined we mustn't have groined you mustn't have groined they mustn't have groined	I mustn't have been groining you mustn't have been groining he mustn't have been groining we mustn't have been groining you mustn't have been groining they mustn't have been groining

Interrogative form

Simple form	V-ing form
must I groin? must you groin? must he groin? must we groin? must you groin? must they groin?	must I be groining? must you be groining? must he be groining? must we be groining? must you be groining? must they be groining?
Perfect	V-ing perfect
must I have groined? must you have groined? must he have groined? must we have groined? must you have groined? must they have groined?	must I have been groining? must you have been groining? must he have been groining? must we have been groining? must you have been groining? must they have been groining?

Interro-negative form

Simple form	V-ing form
mustn't I groin? mustn't you groin? mustn't he groin? mustn't we groin? mustn't you groin? mustn't they groin?	mustn't I be groining? mustn't you be groining? mustn't he be groining? mustn't we be groining? mustn't you be groining? mustn't they be groining?
Perfect	V-ing perfect
mustn't I have groined? mustn't you have groined? mustn't he have groined? mustn't we have groined? mustn't you have groined? mustn't they have groined?	mustn't I have been groining? mustn't you have been groining? mustn't he have been groining? mustn't we have been groining? mustn't you have been groining? mustn't they have been groining?