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