Principal parts
n. （英语）动词的主要变化形式
📖 牛津释义
principal parts
(in English) those forms of a verb (ie the infinitive, past tense and past participle) from which all other forms can be derived （英语中动词的）主要部分（即不定式、 过去式和过去分词）.
🧩 词语组成解析
principal
['prɪnsəpl]
adj. 最重要的;主要的;资本的;本金的;
n. 首长，负责人;主要演员，主角;[法]委托人，当事人;本金;
prin主要的+cip拿，抓，握住+al形容词后缀 → 主要的；首要的
n. 零件, 部件
🗣️ 情景例句
Mm-hmm. Let's go ...
嗯哼。我们走吧……
I'm sorry, sir. I didn't mean it.
对不起，老兄，我并没有恶意。
They were expecting their sixth child and were faced with even more pressing economic problems.
第6个孩子即将问世，他们面临着更为严峻的经济问题。