English
Grammar & Punctuation
Procedural
9–10 yrs
Commas to avoid ambiguity
逗号避免歧义
Description
Use commas to clarify meaning and avoid ambiguity in sentences where the absence of a comma could cause misreading
Mastery Evidence
- Insert a comma to prevent ambiguity, e.g. 'Let's eat, Grandma' vs 'Let's eat Grandma' or 'Most of the time, travellers worry about their bags'
- Identify sentences where a missing comma changes the meaning and explain the two possible readings
- Use commas after introductory elements (adverbial phrases, subordinate clauses) to prevent misreading of the main clause
Assessment Prompt
Can your child explain why "Let's eat, Grandma" and "Let's eat Grandma" mean very different things — and use that kind of comma in their own writing to avoid confusion?
Prerequisites 2
Fronted Adverbials and Commas
前置状语后加逗号是一种特定的清晰性用法；本主题将该规律推广至所有防止歧义的语境
Commas in lists
用于表意清晰的逗号建立在逗号基础知识之上；学习者须先掌握在列举中使用逗号，再理解逗号如何消除歧义
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