What type of sentence structure?
When I go to the store, I will grab something to eat.
Complex.
While I am eating I tell my friend jokes.
While I am eating, I tell my friend jokes.
Correct.
Bluetooth a way to connect devices are in every device these days.
Bluetooth, a way to connect devices, are in every device these days.
Jim and Jeff bought a dog and a cat.
Simple (I only have one sentence in this sentence. Also, there is no "extra informatio/dependent clause" so it is not complex either.
I tell my friend jokes, while I am eating.
I tell my friend jokes while I am eating.
On March 31st 2020 there were many kids stuck at home.
On March 31st, 2020, there were many kids stuck at home.
You eat while you are at school with your friends.
Correct. The dependent clause "while you are at school with your friends" is at the end of the sentence so no comma.
GMS is a school, and it is huge.
Compound.
Jimmy my best friend in the whole world is sleeping over at my house tonight.
Jimmy, my best friend in the whole world, is sleeping over at my house tonight.
Yours truly,
While at school with your friends you eat.
While at school with your friends, you eat.
Compound-complex
Dogs man's best friend are better than cats but cats are usually quieter.
I live in Wichita Kansas for most of the school year.
I live in Wichita, Kansas, for most of the school year.
Since I have no friends at school, I get better grades because I can focus.
I ran home, went to school, and ate pasta.
Simple.
Whenever I feel like making students lives miserable I give them a test yet they still think I am the best teacher ever.
Whenever I feel like making students lives miserable, I give them a test, yet they still think I am the best teacher ever.
I traveled from Kansas, United states, to Paris, France.
Correct.
Even though it was old the blue red green and purple feathers made the dress appear beautiful so I wanted it with every fiber of my being even though I had no money.
Even though it was old, the blue, red, green, and purple feathers made the dress appear beautiful, so I wanted it with every fiber of my being even though I had no money.