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 must not clog you must not clog he must not clog we must not clog you must not clog they must not clog	I must not be clogging you must not be clogging he must not be clogging we must not be clogging you must not be clogging they must not be clogging
Perfect	V-ing perfect
I must not have clogged you must not have clogged he must not have clogged we must not have clogged you must not have clogged they must not have clogged	I must not have been clogging you must not have been clogging he must not have been clogging we must not have been clogging you must not have been clogging they must not 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
must I not clog? must you not clog? must he not clog? must we not clog? must you not clog? must they not clog?	must I not be clogging? must you not be clogging? must he not be clogging? must we not be clogging? must you not be clogging? must they not be clogging?
Perfect	V-ing perfect
must I not have clogged? must you not have clogged? must he not have clogged? must we not have clogged? must you not have clogged? must they not have clogged?	must I not have been clogging? must you not have been clogging? must he not have been clogging? must we not have been clogging? must you not have been clogging? must they not have been clogging?