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