HSK 4
Néngfǒu kuānxiàn yíxià, wǒmen xūyào gèng duō shíjiān.
Could you grant us an extension? We need more time.
HSK 5
Tā qǐngqiú lǎoshī kuānxiàn jǐ tiān jiāo zuòyè.
He asked the teacher for a few extra days to submit the assignment.
HSK 6
Gōngsī juédìng kuānxiàn huánkuǎn qīxiàn yí ge yuè.
The company decided to extend the repayment deadline by one month.