The word when, a relative adverb, begins the adjective clause.

" when" 是关系副词，引导形容词从句。

Now, looking on to the relative adverbs.

现在，看看关系副词。

These are the relative adverbs of English.

这些是英语的关系副词。

And this is why we call this a relative adverb.

这就是为什么我们称其为关系副词。

And there are other relative adverbs like while, is another way to say when.

还有其他关系副词，如 while，是表示 when 的另一种方式。

So adjective clauses will start with a relative adverb like where, when, why, how, or whether, or relative pronoun that, who, whom, whose or which.

所以形容词性从句会以一个关系副词，例如 where，when，why，how，或 whether 或关系代词 that，who，whom，whose 或 which 开头。

Now, today, we're going to be looking at using some relative pronouns and some relative adverbs to lengthen out your sentences a little bit, okay?

现在，今天，我们要看看使用一些关系代词和一些关系副词来稍微延长你的句子，好吗？

" When" and " where" are relative adverbs that describe places or times, and that can be used in the same way as " who" , " which" , " whose" and " that" .

“When” 和 “where” 作为关系副词，用于描述地点和时间，用法上和 “who”，“which”，“whose” 还有 “that” 一致。