What is the difference between All and Everything?
All: The whole quantity or extent.
Is nearly always used with a noun, but there are some exceptions to this rule.
Did you eat all the candy? ✔
Did you eat all? ✘
Everything: All the things of a group.
Everything is a pronoun and means each and every one thing.
I explained to her five different topics, and she understood everything.
It means she understood every single one of those five different topics.
نأسف لذلك! كيف يمكننا تحسينها؟ (اختياري)