Subject + 自己
自己 (zìjǐ) means "oneself" or "self" and functions as a noun referring back to the subject of the sentence. It emphasizes that the action or description applies to the subject personally, rather than to someone else.
这件事只能靠自己来解决。
zhè jiàn shì zhǐ néng kào zìjǐ lái jiějué.
This matter can only be resolved by oneself.
自己的事情自己做,别总是依赖别人。
zìjǐ de shìqíng zìjǐ zuò, bié zǒngshì yīlài biérén.
Do your own things yourself; don't always depend on others.
你要对自己有信心。
nǐ yào duì zìjǐ yǒu xìnxīn.
You need to have confidence in yourself.