English verb conjugation
MUST SECOND-GUESS

Regular verb: second-guess - second-guessed - second-guessed

Affirmation

Simple form	V-ing form
I must second-guess you must second-guess he must second-guess we must second-guess you must second-guess they must second-guess	I must be second-guessing you must be second-guessing he must be second-guessing we must be second-guessing you must be second-guessing they must be second-guessing
Perfect	V-ing perfect
I must have second-guessed you must have second-guessed he must have second-guessed we must have second-guessed you must have second-guessed they must have second-guessed	I must have been second-guessing you must have been second-guessing he must have been second-guessing we must have been second-guessing you must have been second-guessing they must have been second-guessing

Negation

Simple form	V-ing form
I must not second-guess you must not second-guess he must not second-guess we must not second-guess you must not second-guess they must not second-guess	I must not be second-guessing you must not be second-guessing he must not be second-guessing we must not be second-guessing you must not be second-guessing they must not be second-guessing
Perfect	V-ing perfect
I must not have second-guessed you must not have second-guessed he must not have second-guessed we must not have second-guessed you must not have second-guessed they must not have second-guessed	I must not have been second-guessing you must not have been second-guessing he must not have been second-guessing we must not have been second-guessing you must not have been second-guessing they must not have been second-guessing

Interrogative form

Simple form	V-ing form
must I second-guess? must you second-guess? must he second-guess? must we second-guess? must you second-guess? must they second-guess?	must I be second-guessing? must you be second-guessing? must he be second-guessing? must we be second-guessing? must you be second-guessing? must they be second-guessing?
Perfect	V-ing perfect
must I have second-guessed? must you have second-guessed? must he have second-guessed? must we have second-guessed? must you have second-guessed? must they have second-guessed?	must I have been second-guessing? must you have been second-guessing? must he have been second-guessing? must we have been second-guessing? must you have been second-guessing? must they have been second-guessing?

Interro-negative form

Simple form	V-ing form
must I not second-guess? must you not second-guess? must he not second-guess? must we not second-guess? must you not second-guess? must they not second-guess?	must I not be second-guessing? must you not be second-guessing? must he not be second-guessing? must we not be second-guessing? must you not be second-guessing? must they not be second-guessing?
Perfect	V-ing perfect
must I not have second-guessed? must you not have second-guessed? must he not have second-guessed? must we not have second-guessed? must you not have second-guessed? must they not have second-guessed?	must I not have been second-guessing? must you not have been second-guessing? must he not have been second-guessing? must we not have been second-guessing? must you not have been second-guessing? must they not have been second-guessing?