The plural form for one country, many leaders is 'The country's leaders...'; the plural for many countries is 'The countries' leaders...
leaders
The plural form for the noun leader is leaders. The plural possessive form is leaders'.
The word countries is the plural form of the singular noun country.The possessive form of the plural noun is countries'.The singular possessive form is country's.
The plural form for the noun leader is leaders. The plural possessive form is leaders'.
The plural word for leader is leaders.
There is no plural form. Do and Do not are verbs
The plural form of him, her, or it is them. (objective pronouns)
Bridges is the plural form of bridge.
The plural form of "is" is "are."
The plural form of "was" is "were."
The plural form of "I" is "we."
"Groceries" is the plural form of "grocery."