Regular verb: staple - stapled - stapled
Simple form | V-ing form |
I must staple you must staple she must staple we must staple you must staple they must staple | I must be stapling you must be stapling she must be stapling we must be stapling you must be stapling they must be stapling |
Perfect | V-ing perfect |
I must have stapled you must have stapled she must have stapled we must have stapled you must have stapled they must have stapled | I must have been stapling you must have been stapling she must have been stapling we must have been stapling you must have been stapling they must have been stapling |
Simple form | V-ing form |
I mustn't staple you mustn't staple she mustn't staple we mustn't staple you mustn't staple they mustn't staple | I mustn't be stapling you mustn't be stapling she mustn't be stapling we mustn't be stapling you mustn't be stapling they mustn't be stapling |
Perfect | V-ing perfect |
I mustn't have stapled you mustn't have stapled she mustn't have stapled we mustn't have stapled you mustn't have stapled they mustn't have stapled | I mustn't have been stapling you mustn't have been stapling she mustn't have been stapling we mustn't have been stapling you mustn't have been stapling they mustn't have been stapling |
Simple form | V-ing form |
must I staple? must you staple? must she staple? must we staple? must you staple? must they staple? | must I be stapling? must you be stapling? must she be stapling? must we be stapling? must you be stapling? must they be stapling? |
Perfect | V-ing perfect |
must I have stapled? must you have stapled? must she have stapled? must we have stapled? must you have stapled? must they have stapled? | must I have been stapling? must you have been stapling? must she have been stapling? must we have been stapling? must you have been stapling? must they have been stapling? |
Simple form | V-ing form |
mustn't I staple? mustn't you staple? mustn't she staple? mustn't we staple? mustn't you staple? mustn't they staple? | mustn't I be stapling? mustn't you be stapling? mustn't she be stapling? mustn't we be stapling? mustn't you be stapling? mustn't they be stapling? |
Perfect | V-ing perfect |
mustn't I have stapled? mustn't you have stapled? mustn't she have stapled? mustn't we have stapled? mustn't you have stapled? mustn't they have stapled? | mustn't I have been stapling? mustn't you have been stapling? mustn't she have been stapling? mustn't we have been stapling? mustn't you have been stapling? mustn't they have been stapling? |