It is a train that is short and on time.

An exclamation is a statement with excitement!

It is a train going off the rails!

A question ends with a question mark, right?

I am not sure when this train arrives?

It is also used to indicate the end or beginning of dialogue.

"Commas are very important," Mr. McCleland said.

A comma is a train that takes its time.

Semicolons link two independent clauses that are similar in thought; similarities are joined together through a semicolon.

They are two like trains passing by one another.

Colons do many things: direct attention to lists, quotations, or explanations.

Colons are like railroad signs. They bring attention to the trains.

A hyphen is like the connecting bolts between train cars.