| I | dam |
|---|---|
| you | dam |
| he/she/it | dams |
| we | dam |
| you | dam |
| they | dam |
| I | dammed |
|---|---|
| you | dammed |
| he/she/it | dammed |
| we | dammed |
| you | dammed |
| they | dammed |
| I | have | dammed |
|---|---|---|
| you | have | dammed |
| he/she/it | has | dammed |
| we | have | dammed |
| you | have | dammed |
| they | have | dammed |
| I | had | dammed |
|---|---|---|
| you | had | dammed |
| he/she/it | had | dammed |
| we | had | dammed |
| you | had | dammed |
| they | had | dammed |
单语范例（未经PONS编辑处理）
The dam is 90 ft high and 775 ft long.
en.wikipedia.org The dams have both a positive and negative impact on human society, outside of the environmental impacts above.
en.wikipedia.org The dam creates a lake which is 4.28 km and irrigates 3263 hectares.
en.wikipedia.org Other ways human impacts could be reduced is to stop the building of dams, reduce loss of habitat, and reduce water pollution.
en.wikipedia.org Flooding of the bed of the river by sand released from behind dams due to bad river management has eliminated spawning grounds.
en.wikipedia.org