我知道窗戶是你打爛的。

I know you were the one who broke the window.

I know that you were the one who broke the window.

I know it was you who broke the window.

Source: Tatoeba

Sentence Composition

1 我 wǒ
  1. I
  2. me
  3. my
2 知道 zhīdào
  1. to know; to become aware of
  2. also pr. zhīdao
3 窗戶 chuānghu window

classifiers: 個, 扇
=4 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)
=4 是 shì variant of 是 shì
=5 你 nǐ you (informal, as opposed to courteous 您 nín)
=5 你 nǐ you (Note: In Taiwan, 妳 is used to address females, but in mainland China, it is not commonly used. Instead, 你 is used to address both males and females.)
6 打爛 dǎlàn to hit hard; to smack
=7 的 de
  1. of; ~'s (possessive particle)
  2. (used after an attribute when it modifies a noun)
  3. (used at the end of a declarative sentence for emphasis)
  4. (used after a noun, verb or adjective to form a nominal expression, as in 皮革的 pígéde "one made of leather" or 跑堂兒的 pǎotángrde "a waiter (literally, one who runs back and forth in a restaurant)" or 新的 xīnde "new one")
  5. also pr. dì or di in poetry and songs
=7 的 dī a taxi; a cab (abbr. for 的士 dīshì)
=7 的 dí really and truly
=7 的 dì (bound form) bull's-eye; target