English verb conjugation
MUST ENTER

Regular verb: enter - entered - entered

Affirmation

Simple form	V-ing form
I must enter you must enter he must enter we must enter you must enter they must enter	I must be entering you must be entering he must be entering we must be entering you must be entering they must be entering
Perfect	V-ing perfect
I must have entered you must have entered he must have entered we must have entered you must have entered they must have entered	I must have been entering you must have been entering he must have been entering we must have been entering you must have been entering they must have been entering

Negation

Simple form	V-ing form
I must not enter you must not enter he must not enter we must not enter you must not enter they must not enter	I must not be entering you must not be entering he must not be entering we must not be entering you must not be entering they must not be entering
Perfect	V-ing perfect
I must not have entered you must not have entered he must not have entered we must not have entered you must not have entered they must not have entered	I must not have been entering you must not have been entering he must not have been entering we must not have been entering you must not have been entering they must not have been entering

Interrogative form

Simple form	V-ing form
must I enter? must you enter? must he enter? must we enter? must you enter? must they enter?	must I be entering? must you be entering? must he be entering? must we be entering? must you be entering? must they be entering?
Perfect	V-ing perfect
must I have entered? must you have entered? must he have entered? must we have entered? must you have entered? must they have entered?	must I have been entering? must you have been entering? must he have been entering? must we have been entering? must you have been entering? must they have been entering?

Interro-negative form

Simple form	V-ing form
must I not enter? must you not enter? must he not enter? must we not enter? must you not enter? must they not enter?	must I not be entering? must you not be entering? must he not be entering? must we not be entering? must you not be entering? must they not be entering?
Perfect	V-ing perfect
must I not have entered? must you not have entered? must he not have entered? must we not have entered? must you not have entered? must they not have entered?	must I not have been entering? must you not have been entering? must he not have been entering? must we not have been entering? must you not have been entering? must they not have been entering?