The 'Grammar focus' states, 'Forwordsendingin×ch×For words ending in \times ch \timesForwordsendingin×ch×, ×sh×\times sh \times×sh×, ×x×or×z×\times x \times or \times z \times×x×or×z×, add×es×.add \times es \times .add×es×.' So, 'box' becomes 'boxes'.
Class 3 › English Text Book › Chapter 6: Cleanliness › Topic: Grammar: Singular and plural forms
Aligned to the NCTB national curriculum.