as a rule
as a rule — 慣用語
1. used for saying what normally happens in a situation, especially when you want t
通常；大致上
表示通常情況或習慣
used for saying what normally happens in a situation, especially when you want to make clear that there are exceptions
As a rule, Mira takes the train to work rather than driving through city traffic.
一般來說，Mira 會搭火車上班，而不是開車在市中心車陣中行駛。
as a rule at sentence beginning, followed by comma
Kabir never orders dessert as a rule, though he made an exception for his grandmother.
Kabir 通常不點甜點，不過他為祖母破例了一次。
as a rule mid-sentence after verb phrase
The museum closes at five as a rule, though it stays open late on Fridays.
博物館通常下午五點關門，不過星期五會開到比較晚。
As a rule, Beatrix checks her email after breakfast and again after lunch.
一般來說，Beatrix 會在早餐後和午餐後檢查電子郵件。
Constanza's cat sleeps on the sofa as a rule, but sometimes moves to the bed.
Constanza 的貓通常睡在沙發上，但有時候會改窩在床上。
- generally
more common in everyday speech; 'as a rule' feels slightly more deliberate
- usually
the simplest and most neutral alternative; fits any register
- by and large
more informal; often used when acknowledging exceptions are common
- in general
similar tone; can feel more formal or academic
文法句型
as a rule + comma + main clause
subject + verb + as a rule
用法筆記
This idiom is most natural in present-tense sentences describing habits, routines, or general truths. It can go at the start of a clause (commonly followed by a comma) or in the middle between the subject and the main verb. Contrast with 'as a rule of thumb,' which is a different fixed expression for rough estimation.