Regular verb: crumple - crumpled - crumpled
Simple form | V-ing form |
I must crumple you must crumple she must crumple we must crumple you must crumple they must crumple | I must be crumpling you must be crumpling she 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 she 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 she 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 must not crumple you must not crumple she must not crumple we must not crumple you must not crumple they must not crumple | I must not be crumpling you must not be crumpling she must not be crumpling we must not be crumpling you must not be crumpling they must not be crumpling |
Perfect | V-ing perfect |
I must not have crumpled you must not have crumpled she must not have crumpled we must not have crumpled you must not have crumpled they must not have crumpled | I must not have been crumpling you must not have been crumpling she must not have been crumpling we must not have been crumpling you must not have been crumpling they must not have been crumpling |
Simple form | V-ing form |
must I crumple? must you crumple? must she crumple? must we crumple? must you crumple? must they crumple? | must I be crumpling? must you be crumpling? must she 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 she 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 she have been crumpling? must we have been crumpling? must you have been crumpling? must they have been crumpling? |
Simple form | V-ing form |
must I not crumple? must you not crumple? must she not crumple? must we not crumple? must you not crumple? must they not crumple? | must I not be crumpling? must you not be crumpling? must she not be crumpling? must we not be crumpling? must you not be crumpling? must they not be crumpling? |
Perfect | V-ing perfect |
must I not have crumpled? must you not have crumpled? must she not have crumpled? must we not have crumpled? must you not have crumpled? must they not have crumpled? | must I not have been crumpling? must you not have been crumpling? must she not have been crumpling? must we not have been crumpling? must you not have been crumpling? must they not have been crumpling? |