这个问题老师能不能再解释一遍？

Zhè gè wèntí lǎoshī néng bu néng zài jiěshì yíbiàn?

Could the teacher explain this question once more?

你今天能不能来我家吃饭？

Nǐ jīntiān néng bu néng lái wǒjiā chīfàn?

Can you come to my home for a meal today?

你能不能给我一点时间考虑？

Nǐ néng bu néng gěi wǒ yìdiǎn shíjiān kǎolǜ?

Could you give me a little time to think about it?