devote oneself to + (doing) sth.
to...有兩種詞性：
一是“不定式符號(hào)”,表明后面是一動(dòng)詞（原形）,即我們常見(jiàn)的：to do sth.
二、更多的時(shí)候,to 是一個(gè)普通的“介詞”+ （doing) sth (noun or pron)
一說(shuō)你就知道：
e.g.Let's to to school.
He'll come to the company...
How can I get to the museum?
這些句子中的to 都是你熟悉的介詞,當(dāng)它后跟名詞或代詞時(shí),你沒(méi)有覺(jué)得什么特別的.
但如果遇到動(dòng)詞,就要將 do sth 改成 doing sth,因?yàn)榈览砗芎?jiǎn)單,動(dòng)詞不能做介詞賓語(yǔ).
類似的常見(jiàn)短語(yǔ)中含介詞 to (doing) sth：
pay attention to doing.be used to doing...contribute to doing...be dedicated to doing = devoted,look forward to doing.,etc.