HSK 2
Tā qǐngqiú lǎoshī kuānxiàn jǐ tiān jiāo zuòyè.
He asked the teacher for a few extra days to submit the assignment.
HSK 6
Néngfǒu kuānxiàn yīxià, wǒmen xūyào gèngduō shíjiān.
Could you grant us an extension? We need more time.
HSK 7-9
Gōngsī juédìng kuānxiàn huánkuǎn qīxiàn yīgè yuè.
The company decided to extend the repayment deadline by one month.