jackknife的现在完成时怎么拼写？

jackknife的一般过去时为：jackknifed...

n.折叠刀v.对折，用折叠刀切...

jackknife的第三人称单数（三单）为：jackknifes...

Yes, simple ones like the swallow and jackknife but not fancy diving.跳的, 跳简单的例如燕式、弯身式,但不会跳花式.But, yahoo still is put in jackknife government issue.但是, 雅虎仍存在重叠管理问题.Two periodic jackknife, be helpful for national economy g...

jackknife的现在进行时为：jackknifing...

jackknife的音标：jackknife的英式发音音标为：['dʒæknaɪf]jackknife的美式发音音标为：['dʒækˌnaɪf]...