那 + Clause
那 (nà) can function as a conjunction meaning 'then' or 'in that case,' used to introduce a consequence or next action. This usage is very common in spoken Chinese to transition between ideas or signal a logical follow-up.
那我们就先吃饭,吃完再去看电影吧。
Nà wǒmen jiù xiān chīfàn, chī wán zài qù kàn diànyǐng ba.
Then let's eat first and go see a movie after we finish.
你不想去的话,那就算了。
Nǐ bù xiǎng qù de huà, nà jiù suàn le.
If you don't want to go, then forget it.
那你明天几点有空?我来找你。
Nà nǐ míngtiān jǐ diǎn yǒu kòng? Wǒ lái zhǎo nǐ.
Then what time are you free tomorrow? I'll come find you.