English verb conjugation
MUST INTERLOCK

Regular verb: interlock - interlocked - interlocked

Affirmation

Simple form	V-ing form
I must interlock you must interlock he must interlock we must interlock you must interlock they must interlock	I must be interlocking you must be interlocking he must be interlocking we must be interlocking you must be interlocking they must be interlocking
Perfect	V-ing perfect
I must have interlocked you must have interlocked he must have interlocked we must have interlocked you must have interlocked they must have interlocked	I must have been interlocking you must have been interlocking he must have been interlocking we must have been interlocking you must have been interlocking they must have been interlocking

Negation

Simple form	V-ing form
I must not interlock you must not interlock he must not interlock we must not interlock you must not interlock they must not interlock	I must not be interlocking you must not be interlocking he must not be interlocking we must not be interlocking you must not be interlocking they must not be interlocking
Perfect	V-ing perfect
I must not have interlocked you must not have interlocked he must not have interlocked we must not have interlocked you must not have interlocked they must not have interlocked	I must not have been interlocking you must not have been interlocking he must not have been interlocking we must not have been interlocking you must not have been interlocking they must not have been interlocking

Interrogative form

Simple form	V-ing form
must I interlock? must you interlock? must he interlock? must we interlock? must you interlock? must they interlock?	must I be interlocking? must you be interlocking? must he be interlocking? must we be interlocking? must you be interlocking? must they be interlocking?
Perfect	V-ing perfect
must I have interlocked? must you have interlocked? must he have interlocked? must we have interlocked? must you have interlocked? must they have interlocked?	must I have been interlocking? must you have been interlocking? must he have been interlocking? must we have been interlocking? must you have been interlocking? must they have been interlocking?

Interro-negative form

Simple form	V-ing form
must I not interlock? must you not interlock? must he not interlock? must we not interlock? must you not interlock? must they not interlock?	must I not be interlocking? must you not be interlocking? must he not be interlocking? must we not be interlocking? must you not be interlocking? must they not be interlocking?
Perfect	V-ing perfect
must I not have interlocked? must you not have interlocked? must he not have interlocked? must we not have interlocked? must you not have interlocked? must they not have interlocked?	must I not have been interlocking? must you not have been interlocking? must he not have been interlocking? must we not have been interlocking? must you not have been interlocking? must they not have been interlocking?