1. Conjunctions
Join Things

2. Conjunctions Conjunctions are connecting words Example:
And adds things together in the sentence “I like baseball and soccer.”
Or also joins, but makes an option “What do you like best, dogs or cats?”
Or can also pose a question.

3. Using And/Or
And - to add things or ideas together; joining conjunction
“I am going to play, and I’m going to study.”
Or - when there is a choice; selective conjunction
“ I am going to play, or I’m going to study.”

4. Using a Comma Before every joining word, a comma (,) must be used
Example:
“I like soup, and I like sandwiches.”
You also must check that a and/or can be used by taking out the , and/, or and replacing it with a period.

5. Different Conjunctions
Conjunctions aren’t only and/or, here are some others:
so because but then after
also just a (,) if while
since but that when though neither/nor thus therefore
and more

6. Using other conjunctions
But - to let us know that something happened in a sentence that we did not expect or to prepare us for an excuse; conjunction of difference
"Michael went to the movies, but Sarah stayed home."
So - to introduce something that follows or is a result of something else; conjunction of consequence
“Michael went to the movies, so Sarah went to visit her friend.” 
Yet - to introduce a result that is different or opposite from what we expected or what would be normal; a conjunction of unexpected difference
"Michael and Sarah went to the movies, yet she was worried about leaving the baby with a sitter."

7. More uses of conjunctions
Although – (can also be an adverb) to introduce a condition or situation that is contrary to the first part of the sentence; conjunction of contrariness
"Michael and Sarah went to the movies, although the heavy snow made it dangerous to drive."
Since – (can also be an adverb or a preposition) means "during a period following a time when", "continuously from some time in the past", or "because“
"Sarah went to see the movie by herself since Michael did not like love stories." 
Because - to introduce a reason for another action or event; conjunction answering the question 'why?‘
"Thomas slipped and fell because the sidewalk was covered with ice."