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