Adding Commas to an Introductory Clause - Add commas to introductory clauses

Sep 30, 2026

Lesson practice focused on adding commas to sentences containing introductory clauses. Fifteen example sentences explain when a comma should follow phrases like “Although,” “When,” “Because,” “During,” “After,” “With,” “Since,” and “While,” helping writers separate the introductory element from the main clause. The activity includes repeated rounds of the corrected versions and a small results table labeled Language Arts, supporting mastery through comparison and reinforcement.

LanguageEnglish

CategoryExam

FormatPDF

Pages3

Reading Time8 min

AccessFree to download

Add commas to introductory clauses

Introductory clause comma placement (examples 1-15)

Add a comma to the sentence to seperate the introductory clause. 1) Although sharks have been around for millions of years they existed long before the first dinosaurs appeared. 2) When the gymnast completed her final routine perfectly the crowd jumped to their feet and roared with applause. 3) Because Mars has a reddish surface covered in iron oxide people often call it the Red Planet. 4) During the cooking class at the community center the kids learned how to make homemade pasta from scratch. 5) After the mother sea turtle laid her eggs on the sandy beach she slowly crawled back into the ocean. 6) With wind speeds reaching over three hundred miles per hour tornadoes are among the most powerful storms on Earth. 7) Since the human body contains about two hundred and six bones our skeleton gives us shape and protects our organs. 8) While building a tree house in the old oak tree Jake and his brother found a nest full of baby birds. 9) Because electric eels can produce a powerful shock most predators in the Amazon River stay far away from them. 10) At the end of the obstacle course race Mia crossed the finish line covered in mud and smiling. 11) Before computers were invented people used giant mechanical calculators to solve difficult math problems. 12) When snow falls on a mountain for many years without melting it can slowly compress into a massive glacier. 13) After reading about famous inventors throughout history Aiden started sketching plans for his own simple machine. 14) Because the platypus has a bill like a duck and a tail like a beaver early scientists thought it was a hoax. 15) During recess on a sunny Friday afternoon the entire fourth grade played the biggest kickball game ever. |
Language Arts | [www.CommonCoreSheets.com](www.CommonCoreSheets.com) | 3 | 1-10
11-15 | 93 | 87 | 80 | 73 | 67 | 60 | 53 | 47 | 40 | 33 | | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | | | | | | 27 | 20 | 13 | 7 | 0 | | | | | | Add a comma to the sentence to seperate the introductory clause. 1) Although sharks have been around for millions of years, they existed long before the first dinosaurs appeared. 2) When the gymnast completed her final routine perfectly, the crowd jumped to their feet and roared with applause. 3) Because Mars has a reddish surface covered in iron oxide, people often call it the Red Planet. 4) During the cooking class at the community center, the kids learned how to make homemade pasta from scratch. 5) After the mother sea turtle laid her eggs on the sandy beach, she slowly crawled back into the ocean. 6) With wind speeds reaching over three hundred miles per hour, tornadoes are among the most powerful storms on Earth. 7) Since the human body contains about two hundred and six bones, our skeleton gives us shape and protects our organs. 8) While building a tree house in the old oak tree, Jake and his brother found a nest full of baby birds. 9) Because electric eels can produce a powerful shock, most predators in the Amazon River stay far away from them. 10) At the end of the obstacle course race, Mia crossed the finish line covered in mud and smiling. 11) Before computers were invented, people used giant mechanical calculators to solve difficult math problems. 12) When snow falls on a mountain for many years without melting, it can slowly compress into a massive glacier. 13) After reading about famous inventors throughout history, Aiden started sketching plans for his own simple machine. 14) Because the platypus has a bill like a duck and a tail like a beaver, early scientists thought it was a hoax. 15) During recess on a sunny Friday afternoon, the entire fourth grade played the biggest kickball game ever. |
Language Arts | [www.CommonCoreSheets.com](www.CommonCoreSheets.com) | 3 | 1-10
11-15 | 93 | 87 | 80 | 73 | 67 | 60 | 53 | 47 | 40 | 33 | | --- | --- | --- | --- | --- | --- | --- | --

FAQs

When should you add a comma after an introductory clause?

Add a comma right after the introductory clause so it clearly separates from the main part of the sentence.

Which words commonly introduce the clauses in these examples?

The examples use starters such as “Although,” “When,” “Because,” “During,” “After,” “With,” “Since,” and “While.”

Do the practice items show both incorrect and corrected punctuation?

Yes. The document first shows sentences without the comma, then provides revised sentences with the comma placed after the introductory clause.

Sep 30, 2026

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