Without phrases or clauses nothing would make sense. Thoughts and sentences would be useless. That would be like a car with no gasoline
Colons and semicolons are used to separate phrases and clauses. If we didn't use these, we would have sentences that go on forever. Think about a never ending bus ride with no stops
Dependent clauses are dependent on independent clauses. Almost like a baby is dependent on her mother
Subordinating conjunctions provide necessary transitions between two clauses or ideas in a sentence. They act like bridges to connect two roads.
Since we are here, I am going to take a picture." "Sure, just don't drop your phone." "When I take the picture, I will be careful" "As long as you don't drop it, I will allow it" "As long as you don't tell me what to do, I won't drop it."
Colons are used after complete sentences to list something. EX: Jim has two favorite ball players: Christian Yelich and Ronald Acuna Jr.
Semicolons are used to connect two independent clauses. EX: I call my mom every day; I love you.