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