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