Improper comma use, and… Freaking run-on sentences.
I need to give a class in all three grades about run-on sentences ASAP because my students just don’t know when to end a sentence.
EXAMPLE: Yesterday, it was so hot, i went to the store to buy some ice cream, they didn’t have any ice cream, I was mad, disappointed, hungry, I screamed at the lady working behind the counter because there was no ice cream, when I came home my mom said she bought some chocolate candy, I ate that, I was happy.
Depends on the sentence and it’s structure. I am a master of making extremely long sentences, but having them perfectly grammatically correct. So with those they are technically fine, just difficult for some people to read.
If it’s a compound or complex sentence, yes. But you should use coordinating conjunctions to connect two independent clauses, and a relative pronoun to connect an independent clause with a dependent one.