I’d like to return this.
我想退掉它。

Can I have a refund?
能退給我錢(qián)嗎？

Could you alter this, please?
能改變這個(gè)嗎？

The waist needs taking in (letting out) by 3 centimeters.
腰需要收（放）3公分。

Could you make it longer (shorter)?
能做長(zhǎng)（短）點(diǎn)嗎？

Does it take a long time?
要用很長(zhǎng)時(shí)間嗎？

Can you make it a little earlier?
能早點(diǎn)做嗎？

I put money in this vending machine, but a coke didn’t come out.
我把錢(qián)放進(jìn)自動(dòng)售貨機(jī)里，可是沒(méi)有可樂(lè)出來(lái)。