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 Yes, the package should arrive tomorrow morning.

3. In the middle of a sentence to set off clauses, phrases, and words
that are not essential to the meaning of the sentence. Use one comma
before to indicate the beginning of the pause and one at the end to
indicate the end of the pause.
 Clause: That Tuesday, which happens to be my birthday, is the
only day when I am available to meet.
 Phrase: This restaurant has an exciting atmosphere. The food,
on the other hand, is rather bland.

4. To separate three or more words, phrases, or clauses written in a
series.
 The Constitution establishes the legislative, executive, and
judicial branches of government.
 The candidate promised to lower taxes, protect the
environment, reduce crime, and end unemployment.

5. To separate two or more coordinate adjectives that describe the
same noun. Be sure never to add an extra comma between the final
adjective and the noun itself or to use commas with non-coordinate
adjectives.
 He was a difficult, stubborn child. (coordinate)
 They lived in a white frame house. (non-coordinate)

6. Near the end of a sentence to separate contrasted coordinate
elements or to indicate a distinct pause or shift.
 He was merely ignorant, not stupid.

7. To set off phrases at the end of the sentence that refer to the
beginning or middle of the sentence. Such phrases are free modifiers
that can be placed anywhere in the sentence without causing

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