I may preassemble you may preassemble he may preassemble we may preassemble you may preassemble they may preassemble
V-ing form
I may be preassembling you may be preassembling he may be preassembling we may be preassembling you may be preassembling they may be preassembling
Perfect
I may have preassembled you may have preassembled he may have preassembled we may have preassembled you may have preassembled they may have preassembled
V-ing perfect
I may have been preassembling you may have been preassembling he may have been preassembling we may have been preassembling you may have been preassembling they may have been preassembling
Negation
Simple form
I mayn't preassemble you mayn't preassemble he mayn't preassemble we mayn't preassemble you mayn't preassemble they mayn't preassemble
V-ing form
I mayn't be preassembling you mayn't be preassembling he mayn't be preassembling we mayn't be preassembling you mayn't be preassembling they mayn't be preassembling
Perfect
I mayn't have preassembled you mayn't have preassembled he mayn't have preassembled we mayn't have preassembled you mayn't have preassembled they mayn't have preassembled
V-ing perfect
I mayn't have been preassembling you mayn't have been preassembling he mayn't have been preassembling we mayn't have been preassembling you mayn't have been preassembling they mayn't have been preassembling
Interrogative form
Simple form
may I preassemble? may you preassemble? may he preassemble? may we preassemble? may you preassemble? may they preassemble?
V-ing form
may I be preassembling? may you be preassembling? may he be preassembling? may we be preassembling? may you be preassembling? may they be preassembling?
Perfect
may I have preassembled? may you have preassembled? may he have preassembled? may we have preassembled? may you have preassembled? may they have preassembled?
V-ing perfect
may I have been preassembling? may you have been preassembling? may he have been preassembling? may we have been preassembling? may you have been preassembling? may they have been preassembling?
Interro-negative form
Simple form
mayn't I preassemble? mayn't you preassemble? mayn't he preassemble? mayn't we preassemble? mayn't you preassemble? mayn't they preassemble?
V-ing form
mayn't I be preassembling? mayn't you be preassembling? mayn't he be preassembling? mayn't we be preassembling? mayn't you be preassembling? mayn't they be preassembling?
Perfect
mayn't I have preassembled? mayn't you have preassembled? mayn't he have preassembled? mayn't we have preassembled? mayn't you have preassembled? mayn't they have preassembled?
V-ing perfect
mayn't I have been preassembling? mayn't you have been preassembling? mayn't he have been preassembling? mayn't we have been preassembling? mayn't you have been preassembling? mayn't they have been preassembling?