If the singular of a word ends in an s-sound or its plural makes an extra s-sound, simply add an to form the plural. ies es s apostrophe s ('s)

If the noun is plural, just attach an apostrophe. If the noun ending in s is singular, most sources recommend adding both the apostrophe and an additional s. In these cases, the apostrophe + additional s adds another syllable to the pronunciation. If the extra syllable sounds unnatural, add just the apostrophe.

Explanation:

hancock was president of congress when the declaration of independence was adopted and signed. he is primarily remembered by americans for his large, flamboyant signature on the declaration, so much so that "john hancock" became, in the united states, an informal synonym for signature.

explanation: