The bird in the tree. The neigh- bor's cat. Likes to hear it sing. Capitalize the Beginning Word Of a Sentence A sentence is a group of words that expresses a complete thought. The first word of a sentence begins with a capital letter.
All sentences end with an end punctuation mark.
He went to school today. The cat caught a bird. Use Punctuation at the End of a Sentence A sentence is a group of words that expresses a complete thought. The first word of a sentence begins with a capital letter. All sentences end with an end punctuation mark.