Examples
jiǎ rú假如nǐ你méi yǒu没有zhè这gè个chéng xù程序，nǐ你xiàn zài现在jiù就kě yǐ可以qù去xià zǎi下载。
假如你没有这个程序，你现在就可以去下载。
If you do not have this program, you can download it now.
假如能回到过去让人生再来一遍的话，你希望能回到几岁的时候？
If you could go back and start your life again, from what age would you like to start?
假如能一个月之内还上的话，我可以把钱借给你。
I don't mind lending you the money provided you pay it back within a month.