瑪莉告訴湯姆，她以為約翰不在波士頓。

Mary told Tom that she thought John wasn't in Boston.

Source: Tatoeba

Sentence Composition

1 瑪莉 Mǎlì a transliteration of the English female given name Mary
=2 告訴 gàosù to press charges; to file a complaint
=2 告訴 gàosu to tell; to inform; to let know
3 湯姆 Tāngmǔ Tom (name)
4 她 tā she
5 以為 yǐwéi to think; to believe (often with the implication that the belief is mistaken – unless referring to one's own current belief)
6 約翰 Yuēhàn
  1. John (name)
  2. Johan (name)
  3. Johann (name)
7 不在 bùzài
  1. not to be present
  2. to be out
  3. (euphemism) to pass away
  4. to be deceased
8 波士頓 Bōshìdùn Boston, capital of Massachusetts