~後で
Do something after another event
You'll be able to place an action after another action, event, or point in time.

芽衣はご飯を食べた後で歯を磨きます。
mei wa gohan o tabeta ato de ha o migakimasu.
What do you think this sentence means?
Mei brushes her teeth after eating.
Put one action after another
~後で says an action happens after another action or event. It establishes sequence without necessarily saying the second action happens immediately.
授業の後で図書館に行きます。
jugyou no ato de toshokan ni ikimasu.
I go to the library after class.
Form and use ~後で
Use the た-form before 後で even for a future sequence: 食べた後で出かけます. The final predicate carries the sentence’s tense.
授業の後で図書館に行きます。
jugyou no ato de toshokan ni ikimasu.
I go to the library after class.
手を洗った後で料理します。
te o aratta ato de ryouri shimasu.
I cook after washing my hands.
仕事が終わった後で、ジムに行きます。
shigoto ga owatta ato de, jimu ni ikimasu.
I go to the gym after work finishes.
食事の後で、この薬を飲んでください。
shokuji no ato de, kono kusuri o nonde kudasai.
Please take this medicine after meals.
シャワーを浴びた後で、ビールを飲みました。
shawaa o abita ato de, biiru o nomimashita.
After taking a shower, I drank a beer.
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