这本书我下个礼拜看了再给你。(因为说了“下个礼拜”,所以确定这是还没发生的,是在未来的是事)
zhè běn shū wǒ xià ge lǐbài kàn le zài gěi nǐ 。(yīnwèi shuōle “xià ge lǐbài ”,suǒyǐ quèdìng zhè shì hái méi fāshēng de ,shì zài wèilái de shì shì )
I'll give you the book once I finish it next week. (because "next week" has been mentioned, we know that the action hasn't happened yet, it's an action in the future)