The following sentence has been split into four segments. Identify the segment that contains a grammatical error. It was thirty minutes past six / on a early March morning / when he went out / for a walk.

Explanation

The segment that contains a grammatical error is: on a early March morning. Key Points Replace the article 'a' with 'an' to make the sentence correct. 'A' and 'an' are called indefinite articles. 'A' is used when the noun or adjective that comes next begins with a consonant sound. Example - It isalittle speech that I have written for him. 'An' is used when the noun or adjective that comes next begins with a vowel sound. Example - I burned my hand withaniron. A vowel is a syllabic speech sound pronounced without any stricture in the vocal tract. In the given sentence 'Early' as an adverb means before the usual or expected time. The word Early starts with'E' which is a vowel so for a vowel 'an' should be used. Therefore, the correct answer is option 3. Hence, the corrected sentence is:It was thirty minutes past six onan early March morning when he went out for a walk.