| I | scour |
|---|---|
| you | scour |
| he/she/it | scours |
| we | scour |
| you | scour |
| they | scour |
| I | scoured |
|---|---|
| you | scoured |
| he/she/it | scoured |
| we | scoured |
| you | scoured |
| they | scoured |
| I | have | scoured |
|---|---|---|
| you | have | scoured |
| he/she/it | has | scoured |
| we | have | scoured |
| you | have | scoured |
| they | have | scoured |
| I | had | scoured |
|---|---|---|
| you | had | scoured |
| he/she/it | had | scoured |
| we | had | scoured |
| you | had | scoured |
| they | had | scoured |
单语范例（未经PONS编辑处理）
Degradation scour occurs both upstream and downstream from a bridge over large areas.
en.wikipedia.org The structure and slab-on-grade was pile supported due to poor soil conditions and concern over scour from hurricanes.
en.wikipedia.org In those days, scouring powder was made from tallow and finely ground quartz.
en.wikipedia.org Trees in the area were completely debarked or reduced to stumps, and grass was scoured from the ground.
en.wikipedia.org Two feet has been recommended as a minimum settling basin depth to avoid bottom scour.
en.wikipedia.org