Irregular verb: countersink - countersank - countersunk
Simple form | V-ing form |
I must countersink you must countersink he must countersink we must countersink you must countersink they must countersink | I must be countersinking you must be countersinking he must be countersinking we must be countersinking you must be countersinking they must be countersinking |
Perfect | V-ing perfect |
I must have countersunk you must have countersunk he must have countersunk we must have countersunk you must have countersunk they must have countersunk | I must have been countersinking you must have been countersinking he must have been countersinking we must have been countersinking you must have been countersinking they must have been countersinking |
Simple form | V-ing form |
I mustn't countersink you mustn't countersink he mustn't countersink we mustn't countersink you mustn't countersink they mustn't countersink | I mustn't be countersinking you mustn't be countersinking he mustn't be countersinking we mustn't be countersinking you mustn't be countersinking they mustn't be countersinking |
Perfect | V-ing perfect |
I mustn't have countersunk you mustn't have countersunk he mustn't have countersunk we mustn't have countersunk you mustn't have countersunk they mustn't have countersunk | I mustn't have been countersinking you mustn't have been countersinking he mustn't have been countersinking we mustn't have been countersinking you mustn't have been countersinking they mustn't have been countersinking |
Simple form | V-ing form |
must I countersink? must you countersink? must he countersink? must we countersink? must you countersink? must they countersink? | must I be countersinking? must you be countersinking? must he be countersinking? must we be countersinking? must you be countersinking? must they be countersinking? |
Perfect | V-ing perfect |
must I have countersunk? must you have countersunk? must he have countersunk? must we have countersunk? must you have countersunk? must they have countersunk? | must I have been countersinking? must you have been countersinking? must he have been countersinking? must we have been countersinking? must you have been countersinking? must they have been countersinking? |
Simple form | V-ing form |
mustn't I countersink? mustn't you countersink? mustn't he countersink? mustn't we countersink? mustn't you countersink? mustn't they countersink? | mustn't I be countersinking? mustn't you be countersinking? mustn't he be countersinking? mustn't we be countersinking? mustn't you be countersinking? mustn't they be countersinking? |
Perfect | V-ing perfect |
mustn't I have countersunk? mustn't you have countersunk? mustn't he have countersunk? mustn't we have countersunk? mustn't you have countersunk? mustn't they have countersunk? | mustn't I have been countersinking? mustn't you have been countersinking? mustn't he have been countersinking? mustn't we have been countersinking? mustn't you have been countersinking? mustn't they have been countersinking? |