The ninteen fifities, or fifties.
potato - plural - potatoes
An apostrophe is used in situations when we refer to something being possessed. With the apostrophe is refers to plurals. For example: John's cars. Those are the cars owned by John. Mens clothes. This is wrong. Men is a plural itself. It should be: Men's clothes. 1950's best song. This is what was the best song in 1950, not in the years from 1950 to 1959. If you have a plural and possessive together, you can use the apostrophe after the s. Farmers' incomes. This refer to the incomes of many farmers.
The plural of "she" is "they", so the plural of "she had" is "they had".
The plural of 'this' is 'these' and the plural of 'that' is 'those'.
Isthmi is plural. There are actually two plural forms. I will list them from singular to plural. Isthmus - Singular Isthmi - Plural Isthmuses - Plural
The plural of rose is roses. The plural possessive is roses'.
The plural form of can is cans.
Knights is a plural. It is the plural for knight.
applied is does not have a plural but is apply it does have a plural.
The plural is a regular plural, attics.
The plural of 'bunch' is bunches.The plural of 'ant' is ants.The plural of 'batch' is batches.The plural of 'day' is days.The plural of 'chimney' is chimneys.The plural of 'tomato' is tomatoes.The plural of 'umbrella' is umbrellas.The plural of 'donkey' is donkeys.The plural of 'sky' is skies.The plural of 'foot' is feet.The plural of 'show' is shows.
The plural for the noun loss is losses; the plural possessive is losses'.