None of the sentences you provided use a semicolon correctly. Here’s a brief explanation for each:
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Before we go to softball practice; we have to finish our homework.
- This sentence should use a comma instead of a semicolon because it is a dependent clause followed by an independent clause.
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I need to bring the following things; my gym bag, my backpack, and your helmet.
- A colon should be used here instead of a semicolon because the phrase before the colon introduces a list.
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We moved practice to the gym; after it started raining.
- This sentence should use a comma instead of a semicolon because “after it started raining” is a dependent clause that cannot stand alone.
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The stadium is located next to the school; it does not take long to walk there.
- This sentence uses the semicolon correctly. It connects two independent clauses.
So, only the last sentence (The stadium is located next to the school; it does not take long to walk there.) uses a semicolon correctly.