some girls were singing when others were dancing.这句话哪里错了

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some girls were singing when others were dancing.这句话哪里错了
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some girls were singing when others were dancing.这句话哪里错了
some girls were singing when others were dancing.这句话哪里错了

some girls were singing when others were dancing.这句话哪里错了
when应该改成while.
解析:当后面跟的是持续性的动词时,应该用while.

WHEN 改为 WHILE
WHILE 然而, 表转折