The em dash is perhaps the most versatile punctuation mark
Whether to add a final comma before the conjunction in a list is a matter of debate. This final comma, known as an Oxford or serial comma, is useful in a complex series of elements or phrases but is often considered unnecessary in a simple series such as in the example above. It usually comes down to a style choice by the writer.
Punctuation Resources - National Punctuation Day
No, it's the girl, Red Riding Hood, talking to her grandmother. And with a well-placed comma it becomes: Let's eat, Grandma. Without proper punctuation the sentence is ambiguous. Now, before we look at more reasons why punctuation is important, let's have today's quiz question.
Along with , a favorite of the traditionalists. Whatever the merit of the — and both historically and logically, there's not much — there's a substantial body of opinion against end-of-sentence prepositions; if you want to , try to avoid ending written sentences (and clauses) with prepositions, such as to, with, from, at, and in. Instead of writing “The topics we want to write on,” where the preposition on ends the clause, consider “The topics on which we want to write.” Prepositions should usually go before (pre-position) the words they modify.