Correcting a Simple Sentence About Elephants for a 3-Year-Old

The sentence you wrote is almost correct, but it can be made a little better.

Original sentence: Elephants are so big, they drink more than 5 buckets of water a day.

The problem is that it's a run-on sentence because it joins two ideas with just a comma. Instead, we should use because to show why or separate them properly.

Here are two simple correct versions:

• "Elephants are so big because they drink more than 5 buckets of water a day." (This tells why they are so big.)
• "Elephants are so big that they drink more than 5 buckets of water a day." (This shows how being big relates to drinking a lot of water.)

Or, you can use two separate sentences:

"Elephants are so big. They drink more than 5 buckets of water a day."

All of these are easy to understand and grammatically correct!