I must ligate you must ligate he must ligate we must ligate you must ligate they must ligate
V-ing form
I must be ligating you must be ligating he must be ligating we must be ligating you must be ligating they must be ligating
Perfect
I must have ligated you must have ligated he must have ligated we must have ligated you must have ligated they must have ligated
V-ing perfect
I must have been ligating you must have been ligating he must have been ligating we must have been ligating you must have been ligating they must have been ligating
Negation
Simple form
I must not ligate you must not ligate he must not ligate we must not ligate you must not ligate they must not ligate
V-ing form
I must not be ligating you must not be ligating he must not be ligating we must not be ligating you must not be ligating they must not be ligating
Perfect
I must not have ligated you must not have ligated he must not have ligated we must not have ligated you must not have ligated they must not have ligated
V-ing perfect
I must not have been ligating you must not have been ligating he must not have been ligating we must not have been ligating you must not have been ligating they must not have been ligating
Interrogative form
Simple form
must I ligate? must you ligate? must he ligate? must we ligate? must you ligate? must they ligate?
V-ing form
must I be ligating? must you be ligating? must he be ligating? must we be ligating? must you be ligating? must they be ligating?
Perfect
must I have ligated? must you have ligated? must he have ligated? must we have ligated? must you have ligated? must they have ligated?
V-ing perfect
must I have been ligating? must you have been ligating? must he have been ligating? must we have been ligating? must you have been ligating? must they have been ligating?
Interro-negative form
Simple form
must I not ligate? must you not ligate? must he not ligate? must we not ligate? must you not ligate? must they not ligate?
V-ing form
must I not be ligating? must you not be ligating? must he not be ligating? must we not be ligating? must you not be ligating? must they not be ligating?
Perfect
must I not have ligated? must you not have ligated? must he not have ligated? must we not have ligated? must you not have ligated? must they not have ligated?
V-ing perfect
must I not have been ligating? must you not have been ligating? must he not have been ligating? must we not have been ligating? must you not have been ligating? must they not have been ligating?