Warning, this verb may not exist. Conjugation is given as example.
Affirmation
Simple form
I must grub. nuzzle you must grub. nuzzle he must grub. nuzzle we must grub. nuzzle you must grub. nuzzle they must grub. nuzzle
V-ing form
I must be grub. nuzzling you must be grub. nuzzling he must be grub. nuzzling we must be grub. nuzzling you must be grub. nuzzling they must be grub. nuzzling
Perfect
I must have grub. nuzzled you must have grub. nuzzled he must have grub. nuzzled we must have grub. nuzzled you must have grub. nuzzled they must have grub. nuzzled
V-ing perfect
I must have been grub. nuzzling you must have been grub. nuzzling he must have been grub. nuzzling we must have been grub. nuzzling you must have been grub. nuzzling they must have been grub. nuzzling
Negation
Simple form
I mustn't grub. nuzzle you mustn't grub. nuzzle he mustn't grub. nuzzle we mustn't grub. nuzzle you mustn't grub. nuzzle they mustn't grub. nuzzle
V-ing form
I mustn't be grub. nuzzling you mustn't be grub. nuzzling he mustn't be grub. nuzzling we mustn't be grub. nuzzling you mustn't be grub. nuzzling they mustn't be grub. nuzzling
Perfect
I mustn't have grub. nuzzled you mustn't have grub. nuzzled he mustn't have grub. nuzzled we mustn't have grub. nuzzled you mustn't have grub. nuzzled they mustn't have grub. nuzzled
V-ing perfect
I mustn't have been grub. nuzzling you mustn't have been grub. nuzzling he mustn't have been grub. nuzzling we mustn't have been grub. nuzzling you mustn't have been grub. nuzzling they mustn't have been grub. nuzzling
Interrogative form
Simple form
must I grub. nuzzle? must you grub. nuzzle? must he grub. nuzzle? must we grub. nuzzle? must you grub. nuzzle? must they grub. nuzzle?
V-ing form
must I be grub. nuzzling? must you be grub. nuzzling? must he be grub. nuzzling? must we be grub. nuzzling? must you be grub. nuzzling? must they be grub. nuzzling?
Perfect
must I have grub. nuzzled? must you have grub. nuzzled? must he have grub. nuzzled? must we have grub. nuzzled? must you have grub. nuzzled? must they have grub. nuzzled?
V-ing perfect
must I have been grub. nuzzling? must you have been grub. nuzzling? must he have been grub. nuzzling? must we have been grub. nuzzling? must you have been grub. nuzzling? must they have been grub. nuzzling?
Interro-negative form
Simple form
mustn't I grub. nuzzle? mustn't you grub. nuzzle? mustn't he grub. nuzzle? mustn't we grub. nuzzle? mustn't you grub. nuzzle? mustn't they grub. nuzzle?
V-ing form
mustn't I be grub. nuzzling? mustn't you be grub. nuzzling? mustn't he be grub. nuzzling? mustn't we be grub. nuzzling? mustn't you be grub. nuzzling? mustn't they be grub. nuzzling?
Perfect
mustn't I have grub. nuzzled? mustn't you have grub. nuzzled? mustn't he have grub. nuzzled? mustn't we have grub. nuzzled? mustn't you have grub. nuzzled? mustn't they have grub. nuzzled?
V-ing perfect
mustn't I have been grub. nuzzling? mustn't you have been grub. nuzzling? mustn't he have been grub. nuzzling? mustn't we have been grub. nuzzling? mustn't you have been grub. nuzzling? mustn't they have been grub. nuzzling?