| Present "howl" | I | howl | |
| Present Continuous "howl" | I | am howling | |
| Simple past "howl" | I | howled | |
| Past Continuous "howl" | I | was howling | |
| Present perfect "howl" | I | have howled | |
| Present perfect continuous "howl" | I | have been howling | |
| Past perfect "howl" | I | had howled | |
| Past perfect continuous "howl" | I | had been howling | |
| Future "howl" | I | will howl | |
| Future continuous "howl" | I | will be howling | |
| Future perfect "howl" | I | will have howled | |
| Future perfect continuous "howl" | I | will have been howling |