Commas with Adverbs - Writing English

Use a comma after certain adverbs: however, in fact, therefore, nevertheless, moreover, furthermore, still, instead, too (meaning 'also').

Example: Therefore, he didn't say a word.

If these adverbs appear in the middle of a sentence, they are enclosed in commas.

Example: The thief, however, was very clever.

The comma is optional for the following adverbs: then, so, yet.

Example:
 So, she entered the house.
 So she entered the house.

Exercise

see also: → Form of Adverbs

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