Backup 与 Back up的区别及用法详解

单个单词Backup和分隔单词Back up之间是否有区别？

其实有。即使这些术语几乎完全相同，它们在句子中的作用却是不同的词性，因此您永远无法用一个词替代另一个词。请继续阅读以了解更多信息。

在这篇文章中，我将比较Back up与Backup。我将在至少一个例句中使用这些拼写，以便您可以在上下文中看到它们。

另外，我将向您展示一个有用的记忆方法，它使选择Back up或Backup变得更加容易。

##何时使用Backup

Backup是什么意思？ Backup是名词，有时是形容词。

作为名词，Backup指某物的额外或次要版本。例如，在计算中，Backup是在硬件故障或其他数据丢失的情况下单独存储的信息的副本。

这里有一些例子，

* Kayla does a weekly backup of all her personal files to an external hard drive.
* If Plan A fails, don’t worry; we have a backup in place.
* Yet the presentation leaves the claims with less journalistic backup than those in the Times piece. –The Washington Post

Backup作为名词的另一个示例可能是在警察或军事单位的上下文中。

* The convoy of marines was under attack, so they called for backup.

作为一个形容词，Backup描述了额外或次要的质量。例如，Backup（备用）发电机是一台额外的发电机，如果主发电机发生故障，该发电机仍将供电。如果发球手需要休息一天或受伤，Backup接球手可以代替棒球队的发球手。

例如，

* One famous rapper boasted that he has a backup plan to his backup plan, to back up his backup plan.
* Many cyclists carry a spare tube with him as a backup plan in case they get a flat tire.
* He yanked Ryan Fitzpatrick, who had led the Jets to only a field goal in nine possessions, for the backup quarterback Geno Smith, who had lapsed into what amounted to a mini-tantrum on the sideline after Fitzpatrick’s third-quarter interception. –The New York Times

有时，Backup在用作形容词时用连字符拼写： back-up.

##何时使用Back up

Back up是什么意思？ Back up是动词短语。从某种意义上讲，它意味着以辅助角色支持某人或某物（撑腰）。

例如，

* True friends will always back up their friends in a fight, even if they know they will lose.

从另一种意义上讲，Back up可以意味着在计算机上复制信息，就像Backup的一种名词意义一样。

* Back up all your files to the cloud so that you can access them from any device.

Back up也可能意味着向后移动或后退，例如这句话：

* Back up the truck so we can load the mattresses without walking so far.

##记住差异的技巧

Back up是动词短语，而Backup是名词和形容词。请记住，back本身可以是动词，即使不是Back up的短语也可以。另外还有短语back off。

Backup与Back up对比：通过记住该短语中各个单词的词性，您可以轻松记住Back up是动词短语。

##总结

是用Backup还是Back up？将这些单词的拼写分开的只是一个空格，但是它们的作用确实是不同的词性。

* Backup是形容词和名词。
* Back up是动词短语。