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