| I | straighten |
|---|---|
| you | straighten |
| he/she/it | straightens |
| we | straighten |
| you | straighten |
| they | straighten |
| I | straightened |
|---|---|
| you | straightened |
| he/she/it | straightened |
| we | straightened |
| you | straightened |
| they | straightened |
| I | have | straightened |
|---|---|---|
| you | have | straightened |
| he/she/it | has | straightened |
| we | have | straightened |
| you | have | straightened |
| they | have | straightened |
| I | had | straightened |
|---|---|---|
| you | had | straightened |
| he/she/it | had | straightened |
| we | had | straightened |
| you | had | straightened |
| they | had | straightened |
单语范例（未经PONS编辑处理）
Extension usually results in straightening of the bones or body surfaces involved.
en.wikipedia.org In preparation a few curves had to be straightened, the tunnels widened and the bridges strengthened.
en.wikipedia.org As part of the works, the track was straightened over the site of the old station.
en.wikipedia.org When the board is in the process of straightening, the back foot is lifted in a flick motion, causing the board to kickflip.
en.wikipedia.org Most reaches of the river's course have been straightened and channelized.
en.wikipedia.org