What does not change the grammer of a sentence and is used to show strong feeling?

The grammatical element that shows strong feeling without changing the grammar of a sentence is an exclamation point (!).

Here's why:

* No grammatical change: An exclamation point doesn't alter the word order, verb conjugation, or other grammatical structures within a sentence.

* Emphasis and emotion: It is solely used to indicate strong emotion, excitement, surprise, or urgency.

For example:

* "I love pizza!" (Expresses strong enthusiasm)

* "Watch out!" (Warns of danger)

* "This is amazing!" (Shows astonishment)

Let me know if you have any other questions!