The plural form for ther noun motors is motors.
The noun 'car' is a singular, common, concrete noun; a word for a motor vehicle; a word for a thing.
The noun 'motorcycles' is a plural, common, concrete noun; a word for two or more motor vehicles; a word for things.The singular noun is 'motorcycle' a word for one of this type of motor vehicle.
That is the correct spelling of the plural noun "lorries" (motor trucks, notably in the UK).
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.