～後で/に

About

The noun 後あと can be used to indicate that an action happens "after" another. To do this, we attach it directly to a casual past verb or to a noun using the の particle.

E.g. 食たべた後あと
"after (someone) had eaten"
E.g. ランチの後あと
”after lunch"

～後あと can be followed by the に particle or the で particle. ～後あとに links two actions more closely in time, while ～後あとで links them more loosely (as in, the second action may not happen right away).

後あと may also directly attach to a time noun to express "X time from now" or "in X amount of time". In this case, its reading usually changes to 後ご.

E.g. 3時間さんじかん後ご。
"Three hours from now."

Summary

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  Combine 後あと with a noun, or a past casual verb to express that something happens "after" something else

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  ～後あと can be followed by the に or で particle

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  後あと can directly attach to a time noun, in which case its reading usually changes to 後ご