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