引导性成分后的逗号

使用逗号将引导性成分与句子其余部分隔开，包括引导性单词、短语和从句。

Use a comma to separate an introductory element from the rest of the sentence, including introductory words, phrases, and clauses

学习证据 / Evidence

• 在句首的引导性副词后加逗号，例如“However”或“Therefore”。
• 在引导性介词短语后加逗号，例如“In the morning”或“After the game”。
• 正确为引导性从属从句添加标点，例如“When the bell rang, we left”。

• Place commas after introductory adverbs such as 'However' or 'Therefore' at the start of sentences
• Use commas after introductory prepositional phrases like 'In the morning' or 'After the game'
• Punctuate introductory dependent clauses correctly such as 'When the bell rang, we left'

评估问题 / Assessment

当{{name}}用短语或从句开头时——比如“Despite the rain,”或“If you look closely,”——他们会在主句开始前，在这个引导部分后面加上逗号吗？

When {{name}} begins a sentence with a phrase or clause — like "Despite the rain," or "If you look closely," — do they put a comma after that opening part before the main sentence begins?