Questions & Answers about zhè piān wénzhāng hěn yǒuyìsi.
In Chinese, many adjectives act like verbs (often called stative verbs).
有意思 in this sentence is functioning as a verb phrase meaning to be interesting. So:
- 这篇文章很有意思。
literally: This article very interesting.
You normally do not put 是 directly before an adjective that is used as a predicate like this.
Use 是 when linking a subject to a noun or a noun phrase:
- 这篇文章是一篇小说。 – This article is a short story.
Saying 这篇文章是很有意思 is only used in more special/emphatic contexts (e.g., contrasting with something else: 这篇文章是很有意思,但是太长了。 – This article *is interesting, but it’s too long.). For a neutral statement, you just say *这篇文章很有意思。