“有人跟你在一起吗？” “没有，我独自一个人。”

"Was anyone with you?" "No, I was on my own."

Source: Tatoeba

Sentence Composition

1 有人 yǒurén
  1. someone
  2. people
  3. anyone
  4. there is someone there
  5. occupied (as in restroom)
2 跟 gēn
  1. heel
  2. to follow closely
  3. to go with
  4. (of a woman) to marry sb
  5. with
  6. compared with
  7. to
  8. towards
  9. and (joining two nouns)
=3 你 nǐ you (informal, as opposed to courteous 您 nín)
=3 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.)
4 在一起 zàiyīqǐ together
=5 吗 má (coll.) what?
=5 吗 mǎ used in 吗啡 mǎfēi
=5 吗 ma (question particle for "yes-no" questions)
6 没有 méiyǒu
  1. haven't
  2. hasn't
  3. doesn't exist
  4. to not have
  5. to not be
7 我 wǒ
  1. I
  2. me
  3. my
8 独自 dúzì alone
9 一个人 yīgèrén
  1. by oneself (without assistance)
  2. alone (without company)