It's also important to match the number of the pronoun: some pronouns are singular while others are plural. If the antecedent is plural, the pronoun must be plural.
Here's an example where a plural pronoun is mistakenly used with a singular antecedent:
Doug is on their way home from work.
This sentence could easily be corrected by changing the pronoun 'their' to a singular one:
Doug is on his way home from work.
It can be harder to catch a mismatched pronoun and antecedent when they're not in the same sentence, as in:
Suzanne went to the store to buy supplies for her party. They bought balloons, cups, and plates.
Here, 'they' should be changed to 'she' so that it matches its antecedent, 'Suzanne.'
Changing Persons
Another type of pronoun shift that's harder to catch is a change in persons. When writing, it's important to maintain the same person. If a paragraph starts in the third person, it should stay in the third person. Check out the pronoun shift in the following paragraph:
Patrice and I were so excited to travel abroad for the first time. We asked the hotel if you could check in early so that you would have more time.
The paragraph starts out using the first person ('I' and 'we') but switches to the use of the second person ('you').
Here's another example where the pronouns change person:
If you have prepared for the exam by reading the assignments and studying nightly, then students will do their best.
Here, the writer shifts from the second person ('you') to the third person ('their').
Examples of Errors
Here are a few more examples of errors in pronoun shift, along with the corrected versions:
Example One
Matthew was watching television until his mom arrived to take them to practice.
When corrected, the sentence reads:
Matthew was watching television until his mom arrived to take him to practice.
Example Two
You can improve your health by eating their vegetables daily and getting enough exercise.
When corrected, the sentence reads:
You can improve your health by eating your vegetables daily and getting enough exercise.
Or:
People can improve their health by eating their vegetables daily and getting enough exercise.
Example Three
Here's another example:
While we were on our way home it began to pour. They got soaked!
The correct version should read:
While we were on our way home it began to pour. We got soaked!