I. grade [greıd] 名词
| I | downgrade |
|---|---|
| you | downgrade |
| he/she/it | downgrades |
| we | downgrade |
| you | downgrade |
| they | downgrade |
| I | downgraded |
|---|---|
| you | downgraded |
| he/she/it | downgraded |
| we | downgraded |
| you | downgraded |
| they | downgraded |
| I | have | downgraded |
|---|---|---|
| you | have | downgraded |
| he/she/it | has | downgraded |
| we | have | downgraded |
| you | have | downgraded |
| they | have | downgraded |
| I | had | downgraded |
|---|---|---|
| you | had | downgraded |
| he/she/it | had | downgraded |
| we | had | downgraded |
| you | had | downgraded |
| they | had | downgraded |
单语范例（未经PONS编辑处理）
Its natural habitats are subtropical or tropical moist lowland forests, swamps, freshwater marshes, intermittent freshwater marshes, and heavily degraded former forest.
en.wikipedia.org With recent concerns about energy use, it is recognized that using steel trusses creates a thermal bridge that degrades thermal performance.
en.wikipedia.org Over the years, this glue degrades due to age and due to the years of vibration it has been subjected to.
en.wikipedia.org Its natural habitats are subtropical or tropical dry forests, subtropical or tropical moist lowland forests, subtropical or tropical dry shrubland, and heavily degraded former forest.
en.wikipedia.org What a pleasure it is to degrade a woman.
en.wikipedia.org