Final answer:
Exclamation marks on tools in English grammar are used to express strong emotions, emphatic declarations, or commands. They add emphasis to statements and convey heightened feelings.
Step-by-step explanation:
The use of exclamation marks on tools in English grammar signifies a strong feeling or command. This punctuation mark is used at the end of sentences to convey an emphatic declaration, a command, or to express high emotion. For example, in the sentence "What a mess!" she blurted out, the exclamation mark conveys the speaker's surprise or dismay. Similarly, in "Stop! That hurts!" he shouted, the exclamation mark emphasizes the urgent command and the speaker's pain.