Regular verb: flatten - flattened - flattened
Simple form | V-ing form |
I must flatten you must flatten he must flatten we must flatten you must flatten they must flatten | I must be flattening you must be flattening he must be flattening we must be flattening you must be flattening they must be flattening |
Perfect | V-ing perfect |
I must have flattened you must have flattened he must have flattened we must have flattened you must have flattened they must have flattened | I must have been flattening you must have been flattening he must have been flattening we must have been flattening you must have been flattening they must have been flattening |
Simple form | V-ing form |
I must not flatten you must not flatten he must not flatten we must not flatten you must not flatten they must not flatten | I must not be flattening you must not be flattening he must not be flattening we must not be flattening you must not be flattening they must not be flattening |
Perfect | V-ing perfect |
I must not have flattened you must not have flattened he must not have flattened we must not have flattened you must not have flattened they must not have flattened | I must not have been flattening you must not have been flattening he must not have been flattening we must not have been flattening you must not have been flattening they must not have been flattening |
Simple form | V-ing form |
must I flatten? must you flatten? must he flatten? must we flatten? must you flatten? must they flatten? | must I be flattening? must you be flattening? must he be flattening? must we be flattening? must you be flattening? must they be flattening? |
Perfect | V-ing perfect |
must I have flattened? must you have flattened? must he have flattened? must we have flattened? must you have flattened? must they have flattened? | must I have been flattening? must you have been flattening? must he have been flattening? must we have been flattening? must you have been flattening? must they have been flattening? |
Simple form | V-ing form |
must I not flatten? must you not flatten? must he not flatten? must we not flatten? must you not flatten? must they not flatten? | must I not be flattening? must you not be flattening? must he not be flattening? must we not be flattening? must you not be flattening? must they not be flattening? |
Perfect | V-ing perfect |
must I not have flattened? must you not have flattened? must he not have flattened? must we not have flattened? must you not have flattened? must they not have flattened? | must I not have been flattening? must you not have been flattening? must he not have been flattening? must we not have been flattening? must you not have been flattening? must they not have been flattening? |