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