Irregular verb: spring - sprang, sprung - sprung
Simple form | V-ing form |
I must spring you must spring he must spring we must spring you must spring they must spring | I must be springing you must be springing he must be springing we must be springing you must be springing they must be springing |
Perfect | V-ing perfect |
I must have sprung you must have sprung he must have sprung we must have sprung you must have sprung they must have sprung | I must have been springing you must have been springing he must have been springing we must have been springing you must have been springing they must have been springing |
Simple form | V-ing form |
I mustn't spring you mustn't spring he mustn't spring we mustn't spring you mustn't spring they mustn't spring | I mustn't be springing you mustn't be springing he mustn't be springing we mustn't be springing you mustn't be springing they mustn't be springing |
Perfect | V-ing perfect |
I mustn't have sprung you mustn't have sprung he mustn't have sprung we mustn't have sprung you mustn't have sprung they mustn't have sprung | I mustn't have been springing you mustn't have been springing he mustn't have been springing we mustn't have been springing you mustn't have been springing they mustn't have been springing |
Simple form | V-ing form |
must I spring? must you spring? must he spring? must we spring? must you spring? must they spring? | must I be springing? must you be springing? must he be springing? must we be springing? must you be springing? must they be springing? |
Perfect | V-ing perfect |
must I have sprung? must you have sprung? must he have sprung? must we have sprung? must you have sprung? must they have sprung? | must I have been springing? must you have been springing? must he have been springing? must we have been springing? must you have been springing? must they have been springing? |
Simple form | V-ing form |
mustn't I spring? mustn't you spring? mustn't he spring? mustn't we spring? mustn't you spring? mustn't they spring? | mustn't I be springing? mustn't you be springing? mustn't he be springing? mustn't we be springing? mustn't you be springing? mustn't they be springing? |
Perfect | V-ing perfect |
mustn't I have sprung? mustn't you have sprung? mustn't he have sprung? mustn't we have sprung? mustn't you have sprung? mustn't they have sprung? | mustn't I have been springing? mustn't you have been springing? mustn't he have been springing? mustn't we have been springing? mustn't you have been springing? mustn't they have been springing? |