| I | mourn |
|---|---|
| you | mourn |
| he/she/it | mourns |
| we | mourn |
| you | mourn |
| they | mourn |
| I | mourned |
|---|---|
| you | mourned |
| he/she/it | mourned |
| we | mourned |
| you | mourned |
| they | mourned |
| I | have | mourned |
|---|---|---|
| you | have | mourned |
| he/she/it | has | mourned |
| we | have | mourned |
| you | have | mourned |
| they | have | mourned |
| I | had | mourned |
|---|---|---|
| you | had | mourned |
| he/she/it | had | mourned |
| we | had | mourned |
| you | had | mourned |
| they | had | mourned |
单语范例（未经PONS编辑处理）
Mourning doves have perching feet, with three toes forward and one reversed.
en.wikipedia.org White-winged dove and mourning dove are also hunted on private leases.
en.wikipedia.org It burned in the winter of 1901-1902, although not all members mourned the loss.
en.wikipedia.org She spent her last days mourning at the death of her father.
en.wikipedia.org From then on, she led a solitary life and began to mourn.
en.wikipedia.org