Prerequisite Sequence: 〜てから (Only after finishing A, do B)

Mental Model: The Launchpad Gate

When one action serves as the indispensable starting point or mandatory prerequisite for another, Japanese connects them with 〜てから: [Verb in て-form] + から

The logic is rooted in the literal meaning of から as “from” or “starting point”: • 〜て: The first action is established as completed. • から: Sets this completed state as the launchpad from which the next action departs.

Literally: “Starting from the state of having done A, now B occurs.”

Native speakers rely on 〜てから whenever they want to emphasize that Action B cannot or should not happen until Action A is firmly out of the way.

Three Core Nuances

• 1. Strict Sequence & Essential Prerequisites: Emphasizing that the first step must not be skipped: 手を洗ってから、ご飯を食べます。 (”Only after washing your hands do you eat your meal.”)

• 2. Habitual Daily Chains: Describing chronological routines with explicit dependencies: お風呂に入ってから、寝ます。 (”After taking a bath, I go to bed.”)

• 3. Continuous State Since an Event: Describing an unbroken reality that began at a specific turning point: 日本へ来てから、毎日日本語を勉強しています。 (”Ever since coming to Japan, I have been studying Japanese every day.”)

The Crucial Contrast: てから vs あとで

Both structures translate to “after doing...” in English, but their pedagogical nuance is distinct:

• Prerequisite & Continuous Origin (てから):
• Strong psychological connection: Action A is the springboard for Action B.
• Can mean “ever since doing A” (卒業してから, ”ever since graduating”).
• The sentence feels immediate and sequential.

• Neutral Chronological Placement (あとで):
• Requires the past た-form (食べた後で).
• Merely plots two disconnected dots on a timeline.
• Allows for long, ambiguous gaps between events (仕事を辞めた後で、旅行しました, ”Sometime after quitting my job, I traveled”).

Common Foreigner Traps

• Trap 1: Confusing てから with Causal から: Pay meticulous attention to the base verb form!
• 食べてから、行きます: Verb in て-form = ”After eating, I will go.”
• 食べるから、行きます: Verb in dictionary form = ”Because I eat, I will go!”
• Mixing up the verb form completely flips the meaning between time sequence and cause.

• Trap 2: Tense on the て-form: Never put the first verb in the past tense! Saying *食べたから、寝ました means “Because I ate, I went to sleep”. To say “After eating, I went to sleep”, use 食べてから、寝ました.