"The owl has large eyes."
Translation:Le hibou a de grands yeux.
The general rule is that words starting with h with the definite article become l'h. However, there are quite a few words that start with h aspiré (aspirated h), which is pronounced exactly the same but maintains the separate definite article (like le hibou as opposed to l'hibou). Because words starting with h aspiré are pronounced exactly the same as words that take l'h, you just have to memorize them when you come across them. Here's a good list: https://fr.wikipedia.org/wiki/H_aspir%C3%A9
Thank you so much for this! It was mystifying to have l'hippopotame and le hibou in the same set without an explanation of this rule.
I put in "l'hibou" and the correction was told to "Pay attention to the gender" in the message telling me I'm wrong. That's not very helpful.
Another way to understand it is simply that when there is an adjective before the plural noun, "des" becomes "de". It's really that simple. I.e., des livres (books), de grands livres (big books).
- du is single (yeux is multiple). 2. It would be des but for grands. With the adjective inbetween it's just de. 3. les is definite whereas eyes are indefinite here.
In case you haven't figured it out already: https://www.duolingo.com/comment/944289/What-does-B-A-N-G-S-stand-for