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