1. doddle

2. Basic punctuation learned that
The purpose of a full stop is to finish a sentence.
If you are reading a sentence with a question mark who do you let the reader know.

3. commas a comma indicates a short pause e.g.
Suddenly, there was a loud clash of thunder!
A comma is sometimes used at the start of a sentence which is called an adjectival phrase.
commas are used to separate items in a list.

4. First second and third person
the first person is pronounced as I
the second person is pronounced as you or they
the third is pronounced as we