Hello there! As an expert in the field of English grammar, I'm here to help you understand the nuances of possessive forms. The possessive case in English is used to show ownership or a relationship between two entities. When it comes to forming the possessive form of a singular noun that ends in an "s", like "class", there are a few rules to follow.

Firstly, for singular nouns, you generally add an apostrophe (') after the "s". This is because the "s" already indicates that the noun is singular. So, the possessive form of "class" would be "class's". This is used when you want to say that something belongs to or is associated with a class.

However, when dealing with plural nouns that do not end in "s", you simply add an apostrophe after the word to make it possessive. For example, "children" is a plural noun, and its possessive form is "children's".

Now, let's address the plural form of a noun that ends in an "s". When you have a plural noun like "classes", you first make sure the noun is plural, which means it ends in "es" (classes). Then, you add an apostrophe after the "es" to make it possessive. So, the possessive form of "classes" would be "classes'". This indicates that something belongs to or is associated with multiple classes.

It's important to note that the use of the apostrophe can change the meaning of a sentence. For example, "the class's project" means the project that belongs to a single class, while "the classes' project" means the project that belongs to multiple classes.

Additionally, there are some special cases and exceptions to these rules. For instance, some words that end in "s" are not plural, such as "grass". In this case, you would still add an apostrophe after the "s" to make it possessive, resulting in "grass's".

In summary, the possessive form of a singular noun ending in "s" is made by adding an apostrophe after the "s" (class's), while the possessive form of a plural noun ending in "s" is made by adding an apostrophe after the plural form (classes'). It's crucial to remember these rules to ensure that your sentences convey the correct meaning.

Now, let's move on to the translation of this explanation into Chinese.

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To form the singular possessive, simply add the apostrophe following the final --s-- (class' and grass'). To form the plural possessives of these nouns, explain that first the nouns must be made plural (classes, grasses), then simply add an apostrophe to the end of the word (classes', grasses').read more >>