We are finding capital letters. The first word needs a big letter. Choice B has 'The' with a big T.

Sentences begin with big letters. Choice B starts with 'The' correctly. Only the first letter is big.

Sentences start with big letters. Choice C has 'We' with a capital W. The other letters stay small.

We are finding capital letters. The first letter must be big. 'My dog can run' starts with big M.

We need a capital letter first. 'We like to play' starts right. Big W comes first in the sentence.

Sentences begin with capitals. 'I see a ball' is right. The word I is always capital too!

We are learning about capital letters. The correct answer is 'My dog can run.' The first word 'My' starts with a big letter. Every sentence must start with a capital letter.

This tests capital letter rules. The correct choice is 'I see a ball.' The word 'I' is always a capital letter. Plus, it starts the sentence too!

This question aligns with CCSS.RF.1.1.a, which focuses on recognizing the distinguishing features of a sentence, such as first word capitalization and ending punctuation. A sentence is a group of words that expresses a complete thought and must have a capital letter on the first word, ending punctuation like a period, question mark, or exclamation point, and a complete idea with a subject and verb; for example, 'The dog runs.' has a capital 'T', a period at the end, and a complete thought. In this case, choice C, 'The dog can run.', begins with a capital 'T' on 'The', while the others start with lowercase letters. This correct choice works because it follows the rule that every sentence must start with a capital letter to properly signal the beginning in written English. The distractors fail because they lack the initial capital letter, such as starting with 'the' instead of 'The', which is a common error for beginning writers. A good teaching strategy is to use a sentence checklist: Does it start with a capital letter? Does it end with . ? or !? And does it tell a complete idea? Practice by having students identify the first word in their own writing and ensure it's capitalized, and remember that subject + verb + ending punctuation = complete sentence.

We are finding capital letters. The first word needs a big letter. 'The dog can run' starts with big T.