I must merge you must merge he must merge we must merge you must merge they must merge
V-ing form
I must be merging you must be merging he must be merging we must be merging you must be merging they must be merging
Perfect
I must have merged you must have merged he must have merged we must have merged you must have merged they must have merged
V-ing perfect
I must have been merging you must have been merging he must have been merging we must have been merging you must have been merging they must have been merging
Negation
Simple form
I must not merge you must not merge he must not merge we must not merge you must not merge they must not merge
V-ing form
I must not be merging you must not be merging he must not be merging we must not be merging you must not be merging they must not be merging
Perfect
I must not have merged you must not have merged he must not have merged we must not have merged you must not have merged they must not have merged
V-ing perfect
I must not have been merging you must not have been merging he must not have been merging we must not have been merging you must not have been merging they must not have been merging
Interrogative form
Simple form
must I merge? must you merge? must he merge? must we merge? must you merge? must they merge?
V-ing form
must I be merging? must you be merging? must he be merging? must we be merging? must you be merging? must they be merging?
Perfect
must I have merged? must you have merged? must he have merged? must we have merged? must you have merged? must they have merged?
V-ing perfect
must I have been merging? must you have been merging? must he have been merging? must we have been merging? must you have been merging? must they have been merging?
Interro-negative form
Simple form
must I not merge? must you not merge? must he not merge? must we not merge? must you not merge? must they not merge?
V-ing form
must I not be merging? must you not be merging? must he not be merging? must we not be merging? must you not be merging? must they not be merging?
Perfect
must I not have merged? must you not have merged? must he not have merged? must we not have merged? must you not have merged? must they not have merged?
V-ing perfect
must I not have been merging? must you not have been merging? must he not have been merging? must we not have been merging? must you not have been merging? must they not have been merging?