English verb conjugation
MUST LETCH

Regular verb: letch - letched - letched

Affirmation

Simple form	V-ing form
I must letch you must letch he must letch we must letch you must letch they must letch	I must be letching you must be letching he must be letching we must be letching you must be letching they must be letching
Perfect	V-ing perfect
I must have letched you must have letched he must have letched we must have letched you must have letched they must have letched	I must have been letching you must have been letching he must have been letching we must have been letching you must have been letching they must have been letching

Negation

Simple form	V-ing form
I mustn't letch you mustn't letch he mustn't letch we mustn't letch you mustn't letch they mustn't letch	I mustn't be letching you mustn't be letching he mustn't be letching we mustn't be letching you mustn't be letching they mustn't be letching
Perfect	V-ing perfect
I mustn't have letched you mustn't have letched he mustn't have letched we mustn't have letched you mustn't have letched they mustn't have letched	I mustn't have been letching you mustn't have been letching he mustn't have been letching we mustn't have been letching you mustn't have been letching they mustn't have been letching

Interrogative form

Simple form	V-ing form
must I letch? must you letch? must he letch? must we letch? must you letch? must they letch?	must I be letching? must you be letching? must he be letching? must we be letching? must you be letching? must they be letching?
Perfect	V-ing perfect
must I have letched? must you have letched? must he have letched? must we have letched? must you have letched? must they have letched?	must I have been letching? must you have been letching? must he have been letching? must we have been letching? must you have been letching? must they have been letching?

Interro-negative form

Simple form	V-ing form
mustn't I letch? mustn't you letch? mustn't he letch? mustn't we letch? mustn't you letch? mustn't they letch?	mustn't I be letching? mustn't you be letching? mustn't he be letching? mustn't we be letching? mustn't you be letching? mustn't they be letching?
Perfect	V-ing perfect
mustn't I have letched? mustn't you have letched? mustn't he have letched? mustn't we have letched? mustn't you have letched? mustn't they have letched?	mustn't I have been letching? mustn't you have been letching? mustn't he have been letching? mustn't we have been letching? mustn't you have been letching? mustn't they have been letching?