我不知道这是什么东西，但是它很大。

I don't know what it is, but it's something very big.

Source: Tatoeba

Sentence Composition

1 我不知道 wǒbùzhīdào I don't know.
2 这是什么 zhèshìshénme what is this?
=3 东西 dōngxī east and west
=3 东西 dōngxi
  1. thing
  2. stuff
  3. person

classifiers: 個, 件
4 但是 dànshì but; however
=5 它 tā it
=5 它 tā it (pronoun for an animal)
=5 它 tuō
  1. alternative form of 駝 /驼 (tuó)
  2. used in 它它藉藉／它它借借
=5 它 yí only used in 它它
6 很 hěn
  1. very; quite
  2. (also, often used before an adjective without intensifying its meaning, i.e. as a meaningless syntactic element)
=7 大 dà
  1. big; large; great
  2. older (than another person)
  3. eldest (as in 大姐 dàjiě)
  4. greatly; freely; fully
  5. (dialect) father
  6. (dialect) uncle (father's brother)
=7 大 dài see 大夫 dàifu