2、可以加的介詞不同
jump down后面如果加個(gè)from的話用法就和jump off一樣了，后面接主語發(fā)出動(dòng)作的地點(diǎn)。
也就是說跳下懸崖既可以說jump off the cliff，又可以說jump down from the cliff。
jump的用法
1、釋義
n. 跳躍；跳動(dòng)；上漲
v. 跳越；暴漲
2、例句
1、用作不及物動(dòng)詞S+～(+A)
She jumped when she heard the news.
她聽到那消息時(shí),跳了起來。
2、用作及物動(dòng)詞S+～+ n./pron.
The stream was so broad that nobody could jump it.
小溪太寬了,沒人能跳得過去。
3、用作名詞 (n.)
The jump was a very difficult one.
這種跳躍是個(gè)非常難的動(dòng)作。