I must disassemble you must disassemble he must disassemble we must disassemble you must disassemble they must disassemble
V-ing form
I must be disassembling you must be disassembling he must be disassembling we must be disassembling you must be disassembling they must be disassembling
Perfect
I must have disassembled you must have disassembled he must have disassembled we must have disassembled you must have disassembled they must have disassembled
V-ing perfect
I must have been disassembling you must have been disassembling he must have been disassembling we must have been disassembling you must have been disassembling they must have been disassembling
Negation
Simple form
I mustn't disassemble you mustn't disassemble he mustn't disassemble we mustn't disassemble you mustn't disassemble they mustn't disassemble
V-ing form
I mustn't be disassembling you mustn't be disassembling he mustn't be disassembling we mustn't be disassembling you mustn't be disassembling they mustn't be disassembling
Perfect
I mustn't have disassembled you mustn't have disassembled he mustn't have disassembled we mustn't have disassembled you mustn't have disassembled they mustn't have disassembled
V-ing perfect
I mustn't have been disassembling you mustn't have been disassembling he mustn't have been disassembling we mustn't have been disassembling you mustn't have been disassembling they mustn't have been disassembling
Interrogative form
Simple form
must I disassemble? must you disassemble? must he disassemble? must we disassemble? must you disassemble? must they disassemble?
V-ing form
must I be disassembling? must you be disassembling? must he be disassembling? must we be disassembling? must you be disassembling? must they be disassembling?
Perfect
must I have disassembled? must you have disassembled? must he have disassembled? must we have disassembled? must you have disassembled? must they have disassembled?
V-ing perfect
must I have been disassembling? must you have been disassembling? must he have been disassembling? must we have been disassembling? must you have been disassembling? must they have been disassembling?
Interro-negative form
Simple form
mustn't I disassemble? mustn't you disassemble? mustn't he disassemble? mustn't we disassemble? mustn't you disassemble? mustn't they disassemble?
V-ing form
mustn't I be disassembling? mustn't you be disassembling? mustn't he be disassembling? mustn't we be disassembling? mustn't you be disassembling? mustn't they be disassembling?
Perfect
mustn't I have disassembled? mustn't you have disassembled? mustn't he have disassembled? mustn't we have disassembled? mustn't you have disassembled? mustn't they have disassembled?
V-ing perfect
mustn't I have been disassembling? mustn't you have been disassembling? mustn't he have been disassembling? mustn't we have been disassembling? mustn't you have been disassembling? mustn't they have been disassembling?