The 自A自B structure literally means “self...self...”. Set expressions are formed using this construction, where the "A" and "B" are replaced by monosyllabic verbs, nouns and adjectives.
For example, the phrase 自卖自夸 is literally translated as “he sells things by himself and praises himself”. And in a figurative sense it means "to be engaged in self-praise”, “self-promotion”.
Pay attention
This phrase refers to set expressions, which should be remembered.
These are some of them:
自怨自艾 自私自利 自暴自弃 自说自话 自高自大 自给自足 自言自语 自由自在
Pay attention
Such phrases are followed by a verb. The particle 地 is usually placed between the phrase and the verb.
Examples
最奇怪的就是我们自觉自愿地做错误的事情
The weirdest thing is that we willingly make mistakes
zuì qíguài de jiù shì wǒmen zì jué zì yuàn de zuò cuòwù de shìqíng