| I | hum |
|---|---|
| you | hum |
| he/she/it | hums |
| we | hum |
| you | hum |
| they | hum |
| I | hummed |
|---|---|
| you | hummed |
| he/she/it | hummed |
| we | hummed |
| you | hummed |
| they | hummed |
| I | have | hummed |
|---|---|---|
| you | have | hummed |
| he/she/it | has | hummed |
| we | have | hummed |
| you | have | hummed |
| they | have | hummed |
| I | had | hummed |
|---|---|---|
| you | had | hummed |
| he/she/it | had | hummed |
| we | had | hummed |
| you | had | hummed |
| they | had | hummed |
单语范例（未经PONS编辑处理）
Singing is permitted, provided the singer is singing words rather than humming or whistling a tune.
en.wikipedia.org She purposefully hummed along with the tracks he played for her, to get his attention.
en.wikipedia.org In order to remember the tune throughout his guitar-less sojourn, he would hum it to himself daily.
en.wikipedia.org Other animals that are frequently considered beneficial include lizards, spiders, toads, and humming birds.
en.wikipedia.org The resulting sound varies in pitch and loudness with the player's humming.
en.wikipedia.org