Nah, that's a fused sentence!
I want ice cream, I want it now!
I want ice cream, and I want it now!
etc.
The ant, and the grasshopper were friends.
Because my dog was the friendliest puppy in the litter, we picked him.
Correct!
I am going to Spain this spring, and I am so excited!
Compound
If it looks like a duck and quacks like a duck.
Nope! Fragment.
The platypus.
The platypus lives in Australia.
I am afraid of the platypus.
etc.
The ant worked all summer, and the grasshopper just played his fiddle and chilled.
I like spicy food because it unclogs your nose.
Correct!
If it can be fixed, she's the one that can do it.
Complex
Basically, I wanted her to leave.
Yes! Complete sentence.
I failed, I didn't care.
I failed because I didn't care.
When I failed, I didn't care.
I failed, but I didn't care.
etc.
The fundraiser was very successful but we still need more money.
Incorrect: The fundraiser was very successful, but we still need more money.
If you want to be scared silly you should go to that haunted house.
WRONG: If you want to be scared silly, you should go to that haunted house.
Simple
If you have a problem, you should talk to her.
Yes! Complete sentence.
On New Year's Eve we are having a party you're invited!
On New Year's Eve we are having a party. You're invited!
On New Year's Eve we are having a party, and you're invited!
etc.
The sun isn't up yet, yet I am awake.
CORRECT! We have yet as an adverb (parts of speech will be our focus in January) and the second yet as a conjunction joining two independent clauses.
Even though we have lived next to each other our whole lives I still don't know much about her.
WRONG: Even though we have lived next to each other our whole lives, I still don't know much about her.
Compound-Complex
The weather turned rainy all at once, I didn't have time to get a coat.
Nope! Comma splice.
I went to the store, however, I couldn't find any Sour Patch Kids, so I went hungry for the day.
I went to the store; however, I couldn't find any Sour Patch Kids, so I went hungry for the day.
I went to the store. However, I couldn't find any Sour Patch Kids, so I went hungry for the day.
I went to the store, but I couldn't find any Sour Patch Kids, so I went hungry for the day.
After losing the game, we are still so sad so we don't want to come out to play.
After losing the game, we are still so sad, so we don't want to come out to play.
I opened the windows, so that the house would cool off.
WRONG: No comma needed for IC + DC
I opened the windows so that the house would cool off.
Note: You WOULD need the comma if we switched the order of the clauses to DC + IC
Even though it's late, I can't sleep because I'm nervous.
Complex