The corrected sentence is: "On Monday, at Hidden Valley Park, we played baseball. At the same time, our parents sat under a tree. It was shady."
On Monday, at Hidden Valley Park, we played baseball. At the same time, our parents sat under a tree. It was shady.
In the given sentence, there are several errors that need to be corrected. Here is a step-by-step breakdown of the necessary corrections:
1. Capitalize the first letter of the sentence: "On Monday."
2. Capitalize the park name: "Hidden Valley Park."
3. Add a comma after "Monday" to separate the day and location: "On Monday, at Hidden Valley Park."
4. Add a comma after "baseball" to separate the activity from the following phrase: "we played baseball, at the same time."
5. Replace "set" with "sat" to show the correct past tense of the verb: "our parents sat under a tree."
6. Add a comma after "tree" to separate the two independent clauses: "our parents sat under a tree, it was shady."