诚实地回答你的问题对他来说是个原则问题。

It is a matter of principle with him to answer your questions honestly.

Source: Tatoeba

Sentence Composition

1 诚实 chéngshí honest
=2 de
  1. -ly
  2. structural particle: used before a verb or adjective, linking it to preceding modifying adverbial adjunct
=2
  1. earth
  2. ground
  3. field
  4. place
  5. land

classifier:

3 回答 huí
  1. to reply; to answer
  2. reply; answer
=4 you (informal, as opposed to courteous nín)
=4 you (Note: In Taiwan, is used to address females, but in mainland China, it is not commonly used. Instead, is used to address both males and females.)
=5 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 de "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. or di in poetry and songs
=5 a taxi; a cab (abbr. for 的士 shì)
=5 really and truly
=5 (bound form) bull's-eye; target
6 问题 wèn
  1. question
  2. problem
  3. issue
  4. topic

classifier:

7 duì
  1. right; correct
  2. towards; at; for
  3. concerning; regarding
  4. to treat (sb a certain way)
  5. to face
  6. (bound form) opposite; facing; matching
  7. to match together; to adjust
  8. to fit; to suit
  9. to answer; to reply
  10. to add; to pour in (a fluid)
  11. to check; to compare
  12. classifier: couple; pair
8
  1. (third-person singular) (since the early 20th century, usu. male) he; him; his
  2. (bound form) other; another; some other (as in 他日 and 他人 rén)
9 来说 láishuō concerning; about
=10 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)
=10 shì variant of shì
=11 used in 自个儿 r
=11
  1. (classifier used before a noun that has no specific classifier)
  2. (bound form) individual
=11 variant of
12 原则 yuán
  1. principle
  2. doctrine

classifier:

13 问题 wèn
  1. question
  2. problem
  3. issue
  4. topic

classifier: