Corrected paragraph:
When the king saw how much land the Marquis owned and how magnificent his castle was, he liked him so much that he said, “I want you to be my son-in-law.” The same day, the Marquis married the princess. Puss became a great lord and never ran after mice, except for fun.
What I fixed (easy to understand):
- I added the word "and" between "owned" and "how magnificent" so the two ideas join nicely.
- I added the word "that" after "so much" to connect the two parts of the sentence better.
- I made "Marquis" start with a capital letter both times because it is a title used like a name in the story.
- I made sure the period goes in the right place at the end of the king's speech (inside the quotes).
If you want, I can read it slowly and point to each change one by one!