1. Explain it simply
A compound complement is a motion word (出/进/上/下/回/过/起) plus 来 or 去.
It attaches after the main verb: 走过来, 站起来, 拿回来.
来 means toward the speaker, 去 means away: 走出来 vs 走出去.
Put 了 after the whole complement: 站起来了, not 站起了来.
2. Show examples
他站起来了。
Tā zhàn qǐlái le.
He stood up.
起来 after 站
孩子跑出去了。
Háizi pǎo chūqù le.
The child ran out.
去 = away from the speaker
请你走过来。
Qǐng nǐ zǒu guòlái.
Please walk over here.
来 = toward the speaker
3. Share a tip
Keep the two-syllable complement together and right after the verb, and let 了 come last - say 站起来了, not 站起了来.

