"That diamond must be the most well-protected thing in the whole building," said their mother.
How do I teach my son, who is in year 2 in the UK , that well-protected is a compound adjective and does need a dash in between? This was the answer to one of the question from his SAT (reading paper 2) . English is not my first language but I really enjoy helping him. They are expected to write simple sentences using conjunctions, powerful verbs, adjectives, adverbs etc.
I think you'll find it difficult to explain. htm #: :text=A%20compound%20word%20is%20a,relationship%20between%20the%20included%20words. It's important to understand that compounds are not two words but two bases, thus "well-protected" consists of the two bases "well" + "protected".
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I think you'll find it difficult to explain.
You might try looking at this: