English verb conjugation
MUST HOUSE-SIT

Irregular verb: house-sit - house-sat - house-sat

Affirmation

Simple form	V-ing form
I must house-sit you must house-sit he must house-sit we must house-sit you must house-sit they must house-sit	I must be house-siting you must be house-siting he must be house-siting we must be house-siting you must be house-siting they must be house-siting
Perfect	V-ing perfect
I must have house-sat you must have house-sat he must have house-sat we must have house-sat you must have house-sat they must have house-sat	I must have been house-siting you must have been house-siting he must have been house-siting we must have been house-siting you must have been house-siting they must have been house-siting

Negation

Simple form	V-ing form
I must not house-sit you must not house-sit he must not house-sit we must not house-sit you must not house-sit they must not house-sit	I must not be house-siting you must not be house-siting he must not be house-siting we must not be house-siting you must not be house-siting they must not be house-siting
Perfect	V-ing perfect
I must not have house-sat you must not have house-sat he must not have house-sat we must not have house-sat you must not have house-sat they must not have house-sat	I must not have been house-siting you must not have been house-siting he must not have been house-siting we must not have been house-siting you must not have been house-siting they must not have been house-siting

Interrogative form

Simple form	V-ing form
must I house-sit? must you house-sit? must he house-sit? must we house-sit? must you house-sit? must they house-sit?	must I be house-siting? must you be house-siting? must he be house-siting? must we be house-siting? must you be house-siting? must they be house-siting?
Perfect	V-ing perfect
must I have house-sat? must you have house-sat? must he have house-sat? must we have house-sat? must you have house-sat? must they have house-sat?	must I have been house-siting? must you have been house-siting? must he have been house-siting? must we have been house-siting? must you have been house-siting? must they have been house-siting?

Interro-negative form

Simple form	V-ing form
must I not house-sit? must you not house-sit? must he not house-sit? must we not house-sit? must you not house-sit? must they not house-sit?	must I not be house-siting? must you not be house-siting? must he not be house-siting? must we not be house-siting? must you not be house-siting? must they not be house-siting?
Perfect	V-ing perfect
must I not have house-sat? must you not have house-sat? must he not have house-sat? must we not have house-sat? must you not have house-sat? must they not have house-sat?	must I not have been house-siting? must you not have been house-siting? must he not have been house-siting? must we not have been house-siting? must you not have been house-siting? must they not have been house-siting?