I must forefend you must forefend he must forefend we must forefend you must forefend they must forefend
V-ing form
I must be forefending you must be forefending he must be forefending we must be forefending you must be forefending they must be forefending
Perfect
I must have forefended you must have forefended he must have forefended we must have forefended you must have forefended they must have forefended
V-ing perfect
I must have been forefending you must have been forefending he must have been forefending we must have been forefending you must have been forefending they must have been forefending
Negation
Simple form
I must not forefend you must not forefend he must not forefend we must not forefend you must not forefend they must not forefend
V-ing form
I must not be forefending you must not be forefending he must not be forefending we must not be forefending you must not be forefending they must not be forefending
Perfect
I must not have forefended you must not have forefended he must not have forefended we must not have forefended you must not have forefended they must not have forefended
V-ing perfect
I must not have been forefending you must not have been forefending he must not have been forefending we must not have been forefending you must not have been forefending they must not have been forefending
Interrogative form
Simple form
must I forefend? must you forefend? must he forefend? must we forefend? must you forefend? must they forefend?
V-ing form
must I be forefending? must you be forefending? must he be forefending? must we be forefending? must you be forefending? must they be forefending?
Perfect
must I have forefended? must you have forefended? must he have forefended? must we have forefended? must you have forefended? must they have forefended?
V-ing perfect
must I have been forefending? must you have been forefending? must he have been forefending? must we have been forefending? must you have been forefending? must they have been forefending?
Interro-negative form
Simple form
must I not forefend? must you not forefend? must he not forefend? must we not forefend? must you not forefend? must they not forefend?
V-ing form
must I not be forefending? must you not be forefending? must he not be forefending? must we not be forefending? must you not be forefending? must they not be forefending?
Perfect
must I not have forefended? must you not have forefended? must he not have forefended? must we not have forefended? must you not have forefended? must they not have forefended?
V-ing perfect
must I not have been forefending? must you not have been forefending? must he not have been forefending? must we not have been forefending? must you not have been forefending? must they not have been forefending?