| Present "amass" | I | amass | |
| Present Continuous "amass" | I | am amassing | |
| Simple past "amass" | I | amassed | |
| Past Continuous "amass" | I | was amassing | |
| Present perfect "amass" | I | have amassed | |
| Present perfect continuous "amass" | I | have been amassing | |
| Past perfect "amass" | I | had amassed | |
| Past perfect continuous "amass" | I | had been amassing | |
| Future "amass" | I | will amass | |
| Future continuous "amass" | I | will be amassing | |
| Future perfect "amass" | I | will have amassed | |
| Future perfect continuous "amass" | I | will have been amassing |