He did not know why.

Meaning: This means that the boy did not understand the reason for the food disappearing.

Choice of Words: He is a pronoun that refers to a male person. Did is a past tense verb that means to perform an action. Not is a negative particle that means to negate or deny something. Know is a verb that means to have knowledge or understanding of something. Why is an interrogative word that means for what reason or purpose.

Alternative Expressions

Related Expressions

• Why did you do that?
• Why did you do it?
• Tree swayed but did not fall.
• Snowman did not feel pain.
• She did not hesitate.
• Time is money, waste not, want not.
• Waste not, want not.
• Why is it?
• The owl explained why fighting was bad.
• The boy wondered why the sky was blue.