diff --git a/02_morphology_files/accusative.md b/02_morphology_files/accusative.md
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--- a/02_morphology_files/accusative.md
+++ b/02_morphology_files/accusative.md
@@ -3,6 +3,12 @@
 Accusative is a case. Case is the form of a word that helps someone to know the function of the word in a sentence. 
 Case helps the reader to know what the word is doing in a sentence. 
 
+## What types of words use case?
+
+* **Noun**- Case on a noun helps the reader to know how someone or something relates to the action of the verb. 
+* **Article**- Case on an article helps the reader know which word the article is attached to. 
+* **Adjective**- Case on an adjective can help the reader to know which noun the adjective is describing. If the adjective is not used to describe something and it acts like a noun, case helps the reader to know how the word relates to the action of the verb.
+* **Participle**- Case on a participle is used in the same way as it is with the noun or adjective. 
 
 The accusative case is often used to identify the person or thing receiving the action.