好
hǎo
完 says you used it all up. 好 says it is ready to use
The picture The moment you straighten the last detail, step back and say 'there'. Not just finished, but fit to use.
Where the picture shows up in 好
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ready to eat
饭做好了，快来吃。
fàn zuò hǎo le, kuài lái chī
Dinner's ready, come and eat.
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booked and holding
位子我已经订好了。
wèizi wǒ yǐjīng dìng hǎo le
I've already got the table booked.
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properly fastened
安全带系好了吗？
ānquándài jì hǎo le ma
Is your seatbelt properly on?
系完了 says the fastening motion ended; 系好了 says the belt is actually holding.
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ready to leave
准备好了就出发。
zhǔnbèi hǎo le jiù chūfā
Once you're set, we'll head off.
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fixed and usable
我的电脑修好了。
wǒ de diànnǎo xiū hǎo le
My laptop's been repaired.