I must preassemble you must preassemble she must preassemble we must preassemble you must preassemble they must preassemble
V-ing form
I must be preassembling you must be preassembling she must be preassembling we must be preassembling you must be preassembling they must be preassembling
Perfect
I must have preassembled you must have preassembled she must have preassembled we must have preassembled you must have preassembled they must have preassembled
V-ing perfect
I must have been preassembling you must have been preassembling she must have been preassembling we must have been preassembling you must have been preassembling they must have been preassembling
Negation
Simple form
I must not preassemble you must not preassemble she must not preassemble we must not preassemble you must not preassemble they must not preassemble
V-ing form
I must not be preassembling you must not be preassembling she must not be preassembling we must not be preassembling you must not be preassembling they must not be preassembling
Perfect
I must not have preassembled you must not have preassembled she must not have preassembled we must not have preassembled you must not have preassembled they must not have preassembled
V-ing perfect
I must not have been preassembling you must not have been preassembling she must not have been preassembling we must not have been preassembling you must not have been preassembling they must not have been preassembling
Interrogative form
Simple form
must I preassemble? must you preassemble? must she preassemble? must we preassemble? must you preassemble? must they preassemble?
V-ing form
must I be preassembling? must you be preassembling? must she be preassembling? must we be preassembling? must you be preassembling? must they be preassembling?
Perfect
must I have preassembled? must you have preassembled? must she have preassembled? must we have preassembled? must you have preassembled? must they have preassembled?
V-ing perfect
must I have been preassembling? must you have been preassembling? must she have been preassembling? must we have been preassembling? must you have been preassembling? must they have been preassembling?
Interro-negative form
Simple form
must I not preassemble? must you not preassemble? must she not preassemble? must we not preassemble? must you not preassemble? must they not preassemble?
V-ing form
must I not be preassembling? must you not be preassembling? must she not be preassembling? must we not be preassembling? must you not be preassembling? must they not be preassembling?
Perfect
must I not have preassembled? must you not have preassembled? must she not have preassembled? must we not have preassembled? must you not have preassembled? must they not have preassembled?
V-ing perfect
must I not have been preassembling? must you not have been preassembling? must she not have been preassembling? must we not have been preassembling? must you not have been preassembling? must they not have been preassembling?