| sg1st | sg2nd | sg3rd | pl1st | pl2nd | pl3rd | |
|---|---|---|---|---|---|---|
| Simple present | mass | mass | masses | mass | mass | mass |
| Present continuous | am massing | are massing | is massing | are massing | are massing | are massing |
| Simple past | massed | massed | massed | massed | massed | massed |
| Past continuous | was massing | were massing | was massing | were massing | were massing | were massing |
| Simple future | will mass | will mass | will mass | will mass | will mass | will mass |
| Future continuous | will be massing | will be massing | will be massing | will be massing | will be massing | will be massing |
| Present perfect | have massed | have massed | has massed | have massed | have massed | have massed |
| Present perfect continuous | have been massing | have been massing | has been massing | have been massing | have been massing | have been massing |
| Past perfect | had massed | had massed | had massed | had massed | had massed | had massed |
| Past perfect continuous | had been massing | had been massing | had been massing | had been massing | had been massing | had been massing |
| Future perfect | will have massed | will have massed | will have massed | will have massed | will have massed | will have massed |
| Future perfect continuous | will have been massing | will have been massing | will have been massing | will have been massing | will have been massing | will have been massing |
| sg1st | sg2nd | sg3rd | pl1st | pl2nd | pl3rd | |
|---|---|---|---|---|---|---|
| Simple present | don't mass | don't mass | doesn't mass | don't mass | don't mass | don't mass |
| Present continuous | am not massing | are not massing | is not massing | are not massing | are not massing | are not massing |
| Simple past | didn't mass | didn't mass | didn't mass | didn't mass | didn't mass | didn't mass |
| Past continuous | was not massing | were not massing | was not massing | were not massing | were not massing | were not massing |
| Simple future | won't mass | won't mass | won't mass | won't mass | won't mass | won't mass |
| Future continuous | will not be massing | will not be massing | will not be massing | will not be massing | will not be massing | will not be massing |
| Present perfect | have not massed | have not massed | has not massed | have not massed | have not massed | have not massed |
| Present perfect continuous | have not been massing | have not been massing | has not been massing | have not been massing | have not been massing | have not been massing |
| Past perfect | had not massed | had not massed | had not massed | had not massed | had not massed | had not massed |
| Past perfect continuous | had not been massing | had not been massing | had not been massing | had not been massing | had not been massing | had not been massing |
| Future perfect | will not have massed | will not have massed | will not have massed | will not have massed | will not have massed | will not have massed |
| Future perfect continuous | will not have been massing | will not have been massing | will not have been massing | will not have been massing | will not have been massing | will not have been massing |