事后 + Subject + Verb
The time word 事后 (shìhòu) means "after the event" or "afterwards" and is used to describe actions or reactions that occur after something has already happened. It is commonly placed at the beginning of a sentence to set the temporal context. It carries a slightly formal tone and is frequent in news reporting.
事后他才意识到自己说错了话。
Shìhòu tā cái yìshí dào zìjǐ shuō cuò le huà.
Only afterward did he realize he had said the wrong thing.
事后调查显示,问题出在管理环节。
Shìhòu diàochá xiǎnshì, wèntí chū zài guǎnlǐ huánjié.
A post-incident investigation revealed that the problem lay in the management process.
她事后非常后悔当时的决定。
Tā shìhòu fēicháng hòuhuǐ dāngshí de juédìng.
She deeply regretted the decision she made at the time afterward.