這不是一個中文句子！

This isn't a sentence in Chinese!

Source: Tatoeba

Sentence Composition

=1 這不 zhèbu (coll.) As a matter of fact, ... (used to introduce evidence for what one has just asserted)
=1 這不 zhèbù connects two clauses, emphasising how the following clause substantiates the preceding clause
=2 是 shì
  1. to be (followed by substantives only)
  2. correct; right; true
  3. (respectful acknowledgement of a command) very well
  4. (adverb for emphatic assertion)
=2 是 shì variant of 是 shì
=3 一個 yīge
  1. a; an; one
  2. the whole (afternoon, summer vacation etc)
=3 一個 yīgè
  1. Combination of the numeral 一 (“one”) and the generic classifier 個／个: a; an; one
  2. same
4 中文 Zhōngwén Chinese language
5 句子 jùzi sentence

classifier: 個