Chinese phrase
是不是欠费了？ shì bú shì qiàn fèi le
Meaning
Maybe the bill hasn't been paid?
When to use it
It suggests that a bill may not have been paid. It is a tentative question about a possible cause, often used for utilities or subscriptions.
Example dialogue
家里的网络怎么断了？ jiā lǐ de wǎng luò zěn me duàn le
Why did the home internet go out?
是不是欠费了？ shì bú shì qiàn fèi le
Maybe the bill hasn't been paid?