Regular verb: erect - erected - erected
Simple form | V-ing form |
I must erect you must erect he must erect we must erect you must erect they must erect | I must be erecting you must be erecting he must be erecting we must be erecting you must be erecting they must be erecting |
Perfect | V-ing perfect |
I must have erected you must have erected he must have erected we must have erected you must have erected they must have erected | I must have been erecting you must have been erecting he must have been erecting we must have been erecting you must have been erecting they must have been erecting |
Simple form | V-ing form |
I must not erect you must not erect he must not erect we must not erect you must not erect they must not erect | I must not be erecting you must not be erecting he must not be erecting we must not be erecting you must not be erecting they must not be erecting |
Perfect | V-ing perfect |
I must not have erected you must not have erected he must not have erected we must not have erected you must not have erected they must not have erected | I must not have been erecting you must not have been erecting he must not have been erecting we must not have been erecting you must not have been erecting they must not have been erecting |
Simple form | V-ing form |
must I erect? must you erect? must he erect? must we erect? must you erect? must they erect? | must I be erecting? must you be erecting? must he be erecting? must we be erecting? must you be erecting? must they be erecting? |
Perfect | V-ing perfect |
must I have erected? must you have erected? must he have erected? must we have erected? must you have erected? must they have erected? | must I have been erecting? must you have been erecting? must he have been erecting? must we have been erecting? must you have been erecting? must they have been erecting? |
Simple form | V-ing form |
must I not erect? must you not erect? must he not erect? must we not erect? must you not erect? must they not erect? | must I not be erecting? must you not be erecting? must he not be erecting? must we not be erecting? must you not be erecting? must they not be erecting? |
Perfect | V-ing perfect |
must I not have erected? must you not have erected? must he not have erected? must we not have erected? must you not have erected? must they not have erected? | must I not have been erecting? must you not have been erecting? must he not have been erecting? must we not have been erecting? must you not have been erecting? must they not have been erecting? |