| I | perform |
|---|---|
| you | perform |
| he/she/it | performs |
| we | perform |
| you | perform |
| they | perform |
| I | performed |
|---|---|
| you | performed |
| he/she/it | performed |
| we | performed |
| you | performed |
| they | performed |
| I | have | performed |
|---|---|---|
| you | have | performed |
| he/she/it | has | performed |
| we | have | performed |
| you | have | performed |
| they | have | performed |
| I | had | performed |
|---|---|---|
| you | had | performed |
| he/she/it | had | performed |
| we | had | performed |
| you | had | performed |
| they | had | performed |
单语范例（未经PONS编辑处理）
One of the most important uses of marine radiotelephony has been to change ships' itineraries, and to perform other business at sea.
en.wikipedia.org They are divided into castes, based mostly on size, that perform different functions.
en.wikipedia.org These bacteria contain photosynthetic pigments in their cytoplasm to perform photosynthesis.
en.wikipedia.org It is legal obligation which is imposed on a party who is required to perform it.
en.wikipedia.org Some physicians will not perform a complete nail avulsion (removal) except under the most extreme circumstances.
en.wikipedia.org