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