Subject + 说完 + (了)
说完 (shuōwán) is a resultative verb compound meaning "to finish speaking." The complement 完 indicates completion of the action 说 (to speak), signaling that someone has said everything they intended to say.
等他说完,我们再讨论吧。
Děng tā shuō wán, wǒmen zài tǎolùn ba.
Let's wait until he finishes speaking, then we'll discuss.
她说完就转身走了。
Tā shuō wán jiù zhuǎn shēn zǒu le.
She turned around and left as soon as she finished speaking.
老师还没说完,下课铃就响了。
Lǎoshī hái méi shuō wán, xiàkè líng jiù xiǎng le.
The teacher hadn't finished speaking when the dismissal bell rang.