The document outlines rules for spelling verbs in the third person singular form in English. It states that generally, verbs take -s in the third person singular form. Verbs ending in -y take -ies if the -y is preceded by a consonant and -s if preceded by a vowel. Verbs ending in -s, -sh, -ch, -z, -dz, -tch, or -ss take -es in the third person singular form. The verbs "go" and "do" also take -es in the third person singular form.