2 sentences

1. 没准他明天会来参加聚会。

   méi​zhǔn tā míng​tiān huì lái cān​jiā jù​huì.

   Maybe he will come to the party tomorrow.

   Source: Dong Chinese Dictionary

2. 他这人做事没准，你最好多留个心眼。

   tā zhè rén zuò​shì méi​zhǔn, nǐ zuì hǎo duō liú gè xīn​yǎn.

   He is unpredictable; you'd better be a bit more cautious.

   Source: Dong Chinese Dictionary