I must windlass you must windlass she must windlass we must windlass you must windlass they must windlass
V-ing form
I must be windlassing you must be windlassing she must be windlassing we must be windlassing you must be windlassing they must be windlassing
Perfect
I must have windlassed you must have windlassed she must have windlassed we must have windlassed you must have windlassed they must have windlassed
V-ing perfect
I must have been windlassing you must have been windlassing she must have been windlassing we must have been windlassing you must have been windlassing they must have been windlassing
Negation
Simple form
I must not windlass you must not windlass she must not windlass we must not windlass you must not windlass they must not windlass
V-ing form
I must not be windlassing you must not be windlassing she must not be windlassing we must not be windlassing you must not be windlassing they must not be windlassing
Perfect
I must not have windlassed you must not have windlassed she must not have windlassed we must not have windlassed you must not have windlassed they must not have windlassed
V-ing perfect
I must not have been windlassing you must not have been windlassing she must not have been windlassing we must not have been windlassing you must not have been windlassing they must not have been windlassing
Interrogative form
Simple form
must I windlass? must you windlass? must she windlass? must we windlass? must you windlass? must they windlass?
V-ing form
must I be windlassing? must you be windlassing? must she be windlassing? must we be windlassing? must you be windlassing? must they be windlassing?
Perfect
must I have windlassed? must you have windlassed? must she have windlassed? must we have windlassed? must you have windlassed? must they have windlassed?
V-ing perfect
must I have been windlassing? must you have been windlassing? must she have been windlassing? must we have been windlassing? must you have been windlassing? must they have been windlassing?
Interro-negative form
Simple form
must I not windlass? must you not windlass? must she not windlass? must we not windlass? must you not windlass? must they not windlass?
V-ing form
must I not be windlassing? must you not be windlassing? must she not be windlassing? must we not be windlassing? must you not be windlassing? must they not be windlassing?
Perfect
must I not have windlassed? must you not have windlassed? must she not have windlassed? must we not have windlassed? must you not have windlassed? must they not have windlassed?
V-ing perfect
must I not have been windlassing? must you not have been windlassing? must she not have been windlassing? must we not have been windlassing? must you not have been windlassing? must they not have been windlassing?