I must temper you must temper he must temper we must temper you must temper they must temper
V-ing form
I must be tempering you must be tempering he must be tempering we must be tempering you must be tempering they must be tempering
Perfect
I must have tempered you must have tempered he must have tempered we must have tempered you must have tempered they must have tempered
V-ing perfect
I must have been tempering you must have been tempering he must have been tempering we must have been tempering you must have been tempering they must have been tempering
Negation
Simple form
I mustn't temper you mustn't temper he mustn't temper we mustn't temper you mustn't temper they mustn't temper
V-ing form
I mustn't be tempering you mustn't be tempering he mustn't be tempering we mustn't be tempering you mustn't be tempering they mustn't be tempering
Perfect
I mustn't have tempered you mustn't have tempered he mustn't have tempered we mustn't have tempered you mustn't have tempered they mustn't have tempered
V-ing perfect
I mustn't have been tempering you mustn't have been tempering he mustn't have been tempering we mustn't have been tempering you mustn't have been tempering they mustn't have been tempering
Interrogative form
Simple form
must I temper? must you temper? must he temper? must we temper? must you temper? must they temper?
V-ing form
must I be tempering? must you be tempering? must he be tempering? must we be tempering? must you be tempering? must they be tempering?
Perfect
must I have tempered? must you have tempered? must he have tempered? must we have tempered? must you have tempered? must they have tempered?
V-ing perfect
must I have been tempering? must you have been tempering? must he have been tempering? must we have been tempering? must you have been tempering? must they have been tempering?
Interro-negative form
Simple form
mustn't I temper? mustn't you temper? mustn't he temper? mustn't we temper? mustn't you temper? mustn't they temper?
V-ing form
mustn't I be tempering? mustn't you be tempering? mustn't he be tempering? mustn't we be tempering? mustn't you be tempering? mustn't they be tempering?
Perfect
mustn't I have tempered? mustn't you have tempered? mustn't he have tempered? mustn't we have tempered? mustn't you have tempered? mustn't they have tempered?
V-ing perfect
mustn't I have been tempering? mustn't you have been tempering? mustn't he have been tempering? mustn't we have been tempering? mustn't you have been tempering? mustn't they have been tempering?