3.1 Commas

Commas before and after Interrupting Words

In conversations, you might interrupt your train of thought by giving more details about what you are talking about. In a sentence, you might interrupt your train of thought with a word or phrase called interrupting words. Interrupting words can come at the beginning or middle of a sentence. When the interrupting words appear at the beginning of the sentence, a comma appears after the word or phrase.

If you can believe it, people once thought the sun and planets orbited around Earth.

Luckily, some people questioned that theory.

When interrupting words come in the middle of a sentence, they are separated from the rest of the sentence by commas. You can determine where the commas should go by looking for the part of the sentence that is not essential for the sentence to make sense.

An Italian astronomer, Galileo, proved that Earth orbited the sun.

We have known, for hundreds of years now, that the Earth and other planets exist in a solar system.

Exercise 4

On your own sheet of paper, copy the sentence and insert commas to separate the interrupting words from the rest of the sentence.

1. I asked my neighbors the retired couple from Florida to bring in my mail.
2. Without a doubt his work has improved over the last few weeks.
3. Our professor Mr. Alamut drilled the lessons into our heads.
4. The meeting is at noon unfortunately which means I will be late for lunch.
5. We came in time for the last part of dinner but most importantly we came in time for dessert.
6. All of a sudden our network crashed and we lost our files.
7. Alex hand the wrench to me before the pipe comes loose again.

Collaboration

Please share with a classmate and compare your answers.