I must varnish you must varnish she must varnish we must varnish you must varnish they must varnish
V-ing form
I must be varnishing you must be varnishing she must be varnishing we must be varnishing you must be varnishing they must be varnishing
Perfect
I must have varnished you must have varnished she must have varnished we must have varnished you must have varnished they must have varnished
V-ing perfect
I must have been varnishing you must have been varnishing she must have been varnishing we must have been varnishing you must have been varnishing they must have been varnishing
Negation
Simple form
I mustn't varnish you mustn't varnish she mustn't varnish we mustn't varnish you mustn't varnish they mustn't varnish
V-ing form
I mustn't be varnishing you mustn't be varnishing she mustn't be varnishing we mustn't be varnishing you mustn't be varnishing they mustn't be varnishing
Perfect
I mustn't have varnished you mustn't have varnished she mustn't have varnished we mustn't have varnished you mustn't have varnished they mustn't have varnished
V-ing perfect
I mustn't have been varnishing you mustn't have been varnishing she mustn't have been varnishing we mustn't have been varnishing you mustn't have been varnishing they mustn't have been varnishing
Interrogative form
Simple form
must I varnish? must you varnish? must she varnish? must we varnish? must you varnish? must they varnish?
V-ing form
must I be varnishing? must you be varnishing? must she be varnishing? must we be varnishing? must you be varnishing? must they be varnishing?
Perfect
must I have varnished? must you have varnished? must she have varnished? must we have varnished? must you have varnished? must they have varnished?
V-ing perfect
must I have been varnishing? must you have been varnishing? must she have been varnishing? must we have been varnishing? must you have been varnishing? must they have been varnishing?
Interro-negative form
Simple form
mustn't I varnish? mustn't you varnish? mustn't she varnish? mustn't we varnish? mustn't you varnish? mustn't they varnish?
V-ing form
mustn't I be varnishing? mustn't you be varnishing? mustn't she be varnishing? mustn't we be varnishing? mustn't you be varnishing? mustn't they be varnishing?
Perfect
mustn't I have varnished? mustn't you have varnished? mustn't she have varnished? mustn't we have varnished? mustn't you have varnished? mustn't they have varnished?
V-ing perfect
mustn't I have been varnishing? mustn't you have been varnishing? mustn't she have been varnishing? mustn't we have been varnishing? mustn't you have been varnishing? mustn't they have been varnishing?