Period /./: At the end of a sentence.
I study English every day.
Comma /,/:
Use a comma before FANBOYS (for, and, nor, but, or, yet, so) when joining two independent sentences: "I love hiking, but my friend prefers swimming.
After an introductory phrase: "Before embarking on the journey, they packed their bags." "So,../ Although,../ Wow,.../ Last year,.../ After the Great War,..."
Exlamation mark /!/: To convey strong emotion and excitement.
That movie was amazing!
Question mark /?/: At the end of every question.
What time does the class start?