Regular verb: smile - smiled - smiled
Simple form | V-ing form |
I must smile you must smile he must smile we must smile you must smile they must smile | I must be smiling you must be smiling he must be smiling we must be smiling you must be smiling they must be smiling |
Perfect | V-ing perfect |
I must have smiled you must have smiled he must have smiled we must have smiled you must have smiled they must have smiled | I must have been smiling you must have been smiling he must have been smiling we must have been smiling you must have been smiling they must have been smiling |
Simple form | V-ing form |
I mustn't smile you mustn't smile he mustn't smile we mustn't smile you mustn't smile they mustn't smile | I mustn't be smiling you mustn't be smiling he mustn't be smiling we mustn't be smiling you mustn't be smiling they mustn't be smiling |
Perfect | V-ing perfect |
I mustn't have smiled you mustn't have smiled he mustn't have smiled we mustn't have smiled you mustn't have smiled they mustn't have smiled | I mustn't have been smiling you mustn't have been smiling he mustn't have been smiling we mustn't have been smiling you mustn't have been smiling they mustn't have been smiling |
Simple form | V-ing form |
must I smile? must you smile? must he smile? must we smile? must you smile? must they smile? | must I be smiling? must you be smiling? must he be smiling? must we be smiling? must you be smiling? must they be smiling? |
Perfect | V-ing perfect |
must I have smiled? must you have smiled? must he have smiled? must we have smiled? must you have smiled? must they have smiled? | must I have been smiling? must you have been smiling? must he have been smiling? must we have been smiling? must you have been smiling? must they have been smiling? |
Simple form | V-ing form |
mustn't I smile? mustn't you smile? mustn't he smile? mustn't we smile? mustn't you smile? mustn't they smile? | mustn't I be smiling? mustn't you be smiling? mustn't he be smiling? mustn't we be smiling? mustn't you be smiling? mustn't they be smiling? |
Perfect | V-ing perfect |
mustn't I have smiled? mustn't you have smiled? mustn't he have smiled? mustn't we have smiled? mustn't you have smiled? mustn't they have smiled? | mustn't I have been smiling? mustn't you have been smiling? mustn't he have been smiling? mustn't we have been smiling? mustn't you have been smiling? mustn't they have been smiling? |