我祖父一个人的时候，有时会自言自语。

My grandfather sometimes talks to himself when he's alone.

Source: Tatoeba

Sentence Composition

1 我 wǒ
  1. I
  2. me
  3. my
2 祖父 zǔfù
  1. father's father
  2. paternal grandfather
3 一个人 yīgèrén
  1. by oneself (without assistance)
  2. alone (without company)
=4 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 跑堂儿的 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
=4 的 dī a taxi; a cab (abbr. for 的士 dīshì)
=4 的 dí really and truly
=4 的 dì (bound form) bull's-eye; target
5 时候 shíhou
  1. time
  2. length of time
  3. moment
  4. period
6 有时 yǒushí
  1. sometimes
  2. now and then
=7 会 huì
  1. can; to have the skill; to know how to
  2. to be likely to; to be sure to
  3. to meet; to get together
  4. meeting; gathering
  5. (suffix) union; group; association
  6. (bound form) a moment (Taiwan pr. huǐ)
=7 会 kuài (bound form) to reckon accounts
8 自言自语 zìyánzìyǔ (idiom) to talk to oneself; to think aloud; to soliloquize