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