Example 147 of Mandarin Chinese

Example Verb meaning Example of...
(147)
球被妈妈藏起来了。
Qíu bèi māma cángqǐlái le.
qiu
ball
bei
BEI
mama
Mom
cang-qilai-le
hide-APPL-PERF
‘The ball has been hidden up by Mom.’
HIDE an Alternation:
BEI Alternation