| 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 To meet this requirement organisations increasingly began to perform a control self-assessment using a recognised standard methodology.
en.wikipedia.org They are divided into castes, based mostly on size, that perform different functions.
en.wikipedia.org This device may be either a general-purpose computer running software to perform the network emulation or a dedicated emulation device.
en.wikipedia.org Costume is the attire that cast members who perform the day-to-day operations of the park must wear.
en.wikipedia.org