在英语语法中，反身代词（reflexive pronouns）是指以“-self”或“-selves”结尾的代词，例如myself，yourself，himself，herself，itself，ourselves，yourselves和themselves。反身代词通常用来强调主语或指代与主语有关的动作或状态。
除了作为强调语气的手段，反身代词还可以与某些动词、形容词和介词形成固定搭配，这些固定搭配在英语中被广泛使用。以下是一些常见的反身代词短语固定搭配。
behave oneself（行为得体）：表示保持礼貌和规矩，不做出粗鲁或不合适的行为，例如：
- You need to behave yourself at the dinner party tonight.
- The children were told to behave themselves while their parents were away.
pride oneself on（以...自豪）：表示对某件事情感到自豪或骄傲，例如：
- She prides herself on her cooking skills.
- He prides himself on being able to fix anything.
help oneself（随便取用）：表示自由地取用某物，例如：
- Help yourself to some snacks.
- You can help yourself to anything in the fridge.
enjoy oneself（玩得开心）：表示愉快地度过时间，例如：
- I really enjoyed myself at the party last night.
- Did you enjoy yourself on your vacation?
avail oneself of（利用）：表示利用某种机会或资源，例如：
- We should avail ourselves of this opportunity to learn something new.
- He availed himself of the chance to speak with the CEO.
以上是反身代词短语固定搭配的一些例子，这些搭配在日常英语交流中非常常见。熟练掌握这些固定搭配可以帮助我们更加自然地表达自己的意思，也能够提高我们的英语表达能力。
