Learn Dutch: Ik zie een rood blad in het bos. - I see a red leaf in the forest.

Blad is a het word (het blad). When a het word follows een (a/an), the adjective describing it does not get the extra -e at the end. If we used het instead of een, the adjective would get the -e (like het rode blad). This is a very common rule that trips up learners!

If I wanted to say 'the red leaf' (het rode blad), why does the spelling change from rood to rode with only one 'o'?

This happens because of Dutch spelling rules for open and closed syllables. When you add the -e ending to rood, the word splits into two syllables: ro-de. The first syllable is now 'open' (it ends in a vowel). In an open syllable, a single vowel letter already makes a long sound, so the second 'o' is dropped.

This lesson is about using in for seasons (like in de zomer). Is the in used here for in het bos the exact same word?

Yes! Just like in English, the Dutch preposition in is highly versatile. It is used both for time periods like seasons (in de zomer, in de herfst) and for physical locations that enclose you, like a forest (in het bos) or a building.

What is the plural of blad if I see many red leaves in the forest?