假如

jiǎ rú yǒu kòng wǒ yī dìng lái

假如有空，我一定来。

I will come provided I have the time.

jiǎ rú xià yǔ le wǒ men hái shi yào qù

假如下雨了，我们还是要去。

Suppose it rained, we would still go.

jiǎ rú tā bù zài jiù liú gè kǒu xìn

假如她不在，就留个口信。

Please leave a message if she isn't in.