grammar → 從
TSUMUGU · TBCL 2 (est.) · 語法
grammar point · tier 1 · 從 starting point: from X (onward)
· cóng
Marks the point an action sets out from (a time, place, or step); the action runs forward from there, with no endpoint fixed.

字源 FORM what the parts do

從 holds the road (彳) and a foot (止) around 从, two people one behind the other; 从 also carries the sound, cóng. A path walked out of one place: the point you leave from.

故事 STORY a scene to remember it by

A foot set down on one mark, and the walking runs forward from it with no far mark in sight.
字源記憶法
框 · Frame
從 [start point] (開始),… (就) …
觸 · Trigger
You have one point the action begins at and want it to run forward from there, with no endpoint to name.
序 · The move
1從 + the point it begins at (time, place, or step)is this where the action sets out from?
2put the 從 phrase at the front, before the subject or clause it scopesdoes it frame what follows, not sit after the verb?
3leave the end open; add 就 if the result holds right from that pointam I pinning a start only, with no 到 endpoint?
例 · Examples
1from (start point)早上開始starting,郵局排隊的人already / right then很多。
From the morning on, the line at the post office is already long.
界 · Boundary
從…到…
從…到… pins both ends and reads off the bounded stretch between them. 從 alone pins only the start; the action runs forward open-ended, no far mark.
在1
在 + place fixes where something sits or happens, a still point. 從 + point names where it sets out and moves forward from.
endpoint smuggled in: 從早上到 → 從早上開始 (no 到 when only the start is meant)
phrase placed after the verb: 排隊從早上 → 從早上排隊 (the 從 phrase fronts the clause)
在 used for a start point: 在早上開始排隊 → 從早上開始排隊
English 'from the morning' has no overt 'onward', so learners stop after 從早上 and drop 開始 or the 就 that makes the action run forward from that point.