depend

depend, rely

这两个动词后跟on(upon)，均有“依赖、依靠”之意。
depend: 侧重指因自身能力不足或缺乏自信心而依靠他人或物给予帮助或支持。
rely: 通常包含着以前的经验证明对方是能依赖的意思。

动词 depend:

1. be contingent upon (something that is elided)
2. have faith or confidence in
   同义词：count, bet, look, calculate, reckon

1. A lot will depend on how she responds to the challenge.
   在很大程度上将取决於她对这一难题的反应。
2. We are depending on you to finish the paper by Friday.
   我们相信你在星期五之前可以完成这篇论文。
3. The country depends heavily on its tourist trade.
   这个国家的经济在很大程度上依靠其旅游业。
4. Children depend on their parents for food and clothing.
   小孩依赖他们的父母供给衣食。

de.pend

v.intr.（不及物动词）
de.pend.ed,de.pend.ing,de.pends
To rely, especially for support or maintenance:
依赖：依赖，尤指依靠支持或维持：
例句：
Children must depend on their parents.
孩子们必须依赖他们的父母

To place trust or confidence:
信任，相信：对…信任或相信：
例句：
You can depend on his honesty.See Synonyms at rely
你可以相信他的诚实参见 rely

To be determined, conditioned, or contingent:
决定于：被…决定、以…为条件或视…而定：
例句：
a grade depending on the results of the final exam.
分级由期终考试的结果而定

To have a dependence:
有所依靠：
例句：
began to depend more and more on drugs.
开始越来越依赖于毒品

To be pending or undecided, as in a court or legislature.
如在法庭或立法机关悬而未决
To hang down:
悬垂：
例句：
.And ever-living Lamps depend in Rows.(Alexander Pope)
.挂成一排的长明灯.(亚历山大·波普)

来源：
Middle English dependen [to hang down]
中古英语 dependen [悬垂]
from Old French dependre
源自 古法语 dependre
from Latin dôpendôre
源自 拉丁语 dôpendôre
dô- [de-]
dô- [前缀，表.否定，相反.]
pendôre [to hang] * see (s)pen-
pendôre [悬挂] *参见 (s)pen-

Depend, indicating condition or contingency, is always followed byon or upon, as inIt depends on who is in charge. Omission of the preposition is typical of casual speech.
Depend 指条件或可能性， 其后通常跟有on 或者 upon ， 例如这取决于谁是负责人 。 在非正式口语中，通常省略介词