Some students think they can study for an important exam by “cramming” all night, they are probably wrong.
Avoiding Run-on Sentences
The length of a sentence has nothing to do with whether or not a sentence is considered a run-on. A run-on sentence is one in which two clauses have been connected incorrectly.
Examples
1. The President’s popularity has plummeted, and she apparently underestimated the opposition.
2. You will be responsible for this material on the final exam. Study it thoroughly now.
Let's think of an independent clause as an independently operated train headed west getting connected to another train headed east.
3. Many people think protectionism can halt rising prices; however, the opposite is actually true.
Nothing but grief will result from coupling these train clauses incorrectly!
We can insert a period and start a new sentence.
Third way to fix a comma splice:
Some students think they can study for an important exam by “cramming” all night. They are probably wrong.
Second way to fix a comma splice:
First way to fix a comma splice
We can use a semicolon.
We can insert a comma plus a coordinating conjunction.
Some students think they can study for an important exam by “cramming” all night; they are probably wrong.
Some students think they can study for an important exam by “cramming” all night, but they are probably wrong.