* Direct objects receive the action of the verb.
Let's look at some examples:
1. She packed her suitcase.
* Verb: Packed
* Direct object: Suitcase (She packed what? The suitcase.)
2. The suitcase was heavy.
* Verb: Was
* Subject: Suitcase
* There is no direct object because the verb "was" is a linking verb, not an action verb.
3. He opened the suitcase.
* Verb: Opened
* Direct object: Suitcase (He opened what? The suitcase.)
In short: "Suitcase" can be a direct object if it receives the action of the verb.