I. ˈjack·knife 名词
1. jackknife (knife):
2. jackknife 体育:
jack·knife ˈdive 名词
| I | jackknife | 
|---|---|
| you | jackknife | 
| he/she/it | jackknifes | 
| we | jackknife | 
| you | jackknife | 
| they | jackknife | 
| I | jackknifed | 
|---|---|
| you | jackknifed | 
| he/she/it | jackknifed | 
| we | jackknifed | 
| you | jackknifed | 
| they | jackknifed | 
| I | have | jackknifed | 
|---|---|---|
| you | have | jackknifed | 
| he/she/it | has | jackknifed | 
| we | have | jackknifed | 
| you | have | jackknifed | 
| they | have | jackknifed | 
| I | had | jackknifed | 
|---|---|---|
| you | had | jackknifed | 
| he/she/it | had | jackknifed | 
| we | had | jackknifed | 
| you | had | jackknifed | 
| they | had | jackknifed | 
