English verb conjugation
MUST CLOG

Regular verb: clog - clogged - clogged

Affirmation

Simple form	V-ing form
I must clog you must clog he must clog we must clog you must clog they must clog	I must be clogging you must be clogging he must be clogging we must be clogging you must be clogging they must be clogging
Perfect	V-ing perfect
I must have clogged you must have clogged he must have clogged we must have clogged you must have clogged they must have clogged	I must have been clogging you must have been clogging he must have been clogging we must have been clogging you must have been clogging they must have been clogging

Negation

Simple form	V-ing form
I mustn't clog you mustn't clog he mustn't clog we mustn't clog you mustn't clog they mustn't clog	I mustn't be clogging you mustn't be clogging he mustn't be clogging we mustn't be clogging you mustn't be clogging they mustn't be clogging
Perfect	V-ing perfect
I mustn't have clogged you mustn't have clogged he mustn't have clogged we mustn't have clogged you mustn't have clogged they mustn't have clogged	I mustn't have been clogging you mustn't have been clogging he mustn't have been clogging we mustn't have been clogging you mustn't have been clogging they mustn't have been clogging

Interrogative form

Simple form	V-ing form
must I clog? must you clog? must he clog? must we clog? must you clog? must they clog?	must I be clogging? must you be clogging? must he be clogging? must we be clogging? must you be clogging? must they be clogging?
Perfect	V-ing perfect
must I have clogged? must you have clogged? must he have clogged? must we have clogged? must you have clogged? must they have clogged?	must I have been clogging? must you have been clogging? must he have been clogging? must we have been clogging? must you have been clogging? must they have been clogging?

Interro-negative form

Simple form	V-ing form
mustn't I clog? mustn't you clog? mustn't he clog? mustn't we clog? mustn't you clog? mustn't they clog?	mustn't I be clogging? mustn't you be clogging? mustn't he be clogging? mustn't we be clogging? mustn't you be clogging? mustn't they be clogging?
Perfect	V-ing perfect
mustn't I have clogged? mustn't you have clogged? mustn't he have clogged? mustn't we have clogged? mustn't you have clogged? mustn't they have clogged?	mustn't I have been clogging? mustn't you have been clogging? mustn't he have been clogging? mustn't we have been clogging? mustn't you have been clogging? mustn't they have been clogging?