如有…，请…
should there be any …, please …
Structure
如有 情况（疑问／不便／变动） ， 请／敬请 动作
What it means
Should there be any …, please …: the standard closing of notices and emails.
How it is built
如有 + situation (疑问／不便／变动)，请／敬请 + action: 如有任何疑问，请随时与我联系 (Should you have any questions, please contact me at any time).
When to use it
如 is 如果, with 有 straight after it and no subject. Also 如需… (should you need) and 如遇… (in the event of). Formal and written; in speech say 要是有问题，就找我.
Watch out
The fixed form has no subject between 如 and 有: write 如有疑问, not 如你有疑问. A noun follows 如有: 如有变动, 如有不便.
Examples
如有任何疑问，请随时与我联系。
Should you have any questions, please contact me at any time.
如有不便，敬请谅解。
Should this cause inconvenience, we ask your understanding.
Learn this in Lesson 109 · HSK 7–9: 商务沟通 (Business talk and business email)
A dialogue, a reading, word cards with audio and a drill that uses it, in Learn Chinese with Bao. The first lessons of every level are free.
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