音标:['ɒpʃәnl] ; 柯林斯词典等级:1 级;
a. 可选择的, 随意的
[化] 选购的
a. possible but not necessary; left to personal choice

考试类型:[高考/四级/六级/考研/托福/IELTS/GRE]
词性分布:
形容词100%

optional的用法和样例:

例句

用作形容词(adj.)
  1. The insurance cover is optional.保险范围可以随意选择。
  2. It is optional with you.那是你的自由。
  3. The goods are optional, but only one.这些物品是可以任选的, 但只能选一个。
  4. A 4-speed automatic transmission is optional.四段自动变速器是可自由选择的。

常见句型

用作形容词(adj.)
用作定语~+ n.
  1. Chinese is our optional course to us students of science.中文是我们这些理科学生的选修科目。
  2. We have some optional subjects.我们有一些选修科目。
用作表语S+be+~
  1. The goods are optional, but only one.这些物品是可以任选的,但只能选一个。
  2. Our attendance at graduation is optional.毕业典礼可以自愿参加。

词汇搭配

用作形容词 (adj.)
~+名词
  • optional course〔subject〕选修科目

经典引文

  • Original writs are either optional or peremptory.

    出自:W. Blackstone
【近义词】
【反义词】

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