I must acetify you must acetify he must acetify we must acetify you must acetify they must acetify
V-ing form
I must be acetifying you must be acetifying he must be acetifying we must be acetifying you must be acetifying they must be acetifying
Perfect
I must have acetified you must have acetified he must have acetified we must have acetified you must have acetified they must have acetified
V-ing perfect
I must have been acetifying you must have been acetifying he must have been acetifying we must have been acetifying you must have been acetifying they must have been acetifying
Negation
Simple form
I must not acetify you must not acetify he must not acetify we must not acetify you must not acetify they must not acetify
V-ing form
I must not be acetifying you must not be acetifying he must not be acetifying we must not be acetifying you must not be acetifying they must not be acetifying
Perfect
I must not have acetified you must not have acetified he must not have acetified we must not have acetified you must not have acetified they must not have acetified
V-ing perfect
I must not have been acetifying you must not have been acetifying he must not have been acetifying we must not have been acetifying you must not have been acetifying they must not have been acetifying
Interrogative form
Simple form
must I acetify? must you acetify? must he acetify? must we acetify? must you acetify? must they acetify?
V-ing form
must I be acetifying? must you be acetifying? must he be acetifying? must we be acetifying? must you be acetifying? must they be acetifying?
Perfect
must I have acetified? must you have acetified? must he have acetified? must we have acetified? must you have acetified? must they have acetified?
V-ing perfect
must I have been acetifying? must you have been acetifying? must he have been acetifying? must we have been acetifying? must you have been acetifying? must they have been acetifying?
Interro-negative form
Simple form
must I not acetify? must you not acetify? must he not acetify? must we not acetify? must you not acetify? must they not acetify?
V-ing form
must I not be acetifying? must you not be acetifying? must he not be acetifying? must we not be acetifying? must you not be acetifying? must they not be acetifying?
Perfect
must I not have acetified? must you not have acetified? must he not have acetified? must we not have acetified? must you not have acetified? must they not have acetified?
V-ing perfect
must I not have been acetifying? must you not have been acetifying? must he not have been acetifying? must we not have been acetifying? must you not have been acetifying? must they not have been acetifying?