Do you mean present and past participles?

那一定是指现在分词或过去分词了。

Note that the past participles of irregular verbs do not end in '-ed', but can be used as adjectives.

注意：不规则动词的过去分词，不能加“- ed”，但可用作形容词。

The following parts can be adjectives, nouns, past participles, present participles, prepositional phrases or clauses.

可充当其后续成分的有形容词、过去分词、现在分词、名词、介词短语及从句。

They may not have verbs, nouns or past participles, but birds challenge the notion that humans alone have evolved grammatical rules.

它们可能没有动词、名词和过去分词，但是鸟类挑战只有人类演化出语法规则这一观念。

There are two participles, the present participle and the past participle.

分词有两种，现在分词和过去分词。