Gàosù tā zhēnxiǎnɡ.
告诉他真相。
Tell him the truth.
Notes:
告诉(ɡàosù): to tell
他(tā): he,him
真相(zhēnxiànɡ): truth
Example:
A:告诉他真相。
Gàosù tā zhēnxiǎnɡ.
Tell him the truth.
B:可以吗?
Kěyǐ mɑ?
Is that ok?