The plural of 40 is 40s (forties), as in the man was in his 40s; the Second World War took place in the first half of the 40s.
The plural of abundance is abundances. It is a regular plural.
The word "police" is plural and it takes a plural verb.
The plural is billions.
The plural is amounts.
The plural is theorems.
The noun form for the number 40 is spelled forty. The plural form is forties.
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'.
applied is does not have a plural but is apply it does have a plural.
Knights is a plural. It is the plural for knight.
The plural form of can is cans.
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'.
pluralsThe word plurals is the plural of plural. As in: I answered the question about plurals to the person who didn't know that the plural of plural is plurals.