Field is singular.
Fields is the plural.
Yes, the noun 'field' is the singular form. The plural form is fields.
He is a singular noun. They would be plural.
Singular. The plural would be "kilograms".
Encyclopedia is singular, encyclopedias would be plural.
Museum is singular. Museum's is singular possessive. Museums is plural. Museums' is plural possessive.
Singular. The plural of Radish would be Radishes
Encyclopedia is singular, encyclopedias would be plural.
No, singular. Plural: yourselves.
Volcanoes is plural. The singular would be volcano and the possessive would be volcano's.
"You are" would be "es", if it is singular, or "estis", if it is plural.
Library is a singular noun. For it to be plural, it would be libraries.
They are both singular and plural. Would is the past form of will.