principal parts noun
Learner's definition of PRINCIPAL PARTS
[plural] grammar
: the main forms of a verb(动词的)主要形式 -
The principal parts of the verb “write” include the infinitive “write,” the past tense “wrote,” the past participle “written,” and the present participle “writing.”动词write的主要形式包括不定式write、过去式wrote、过去分词writen和现在分词writing。