Since you have several topics in your sentence, use the plural are. In addition, many writers would remove the comma after “life”. 3. Nearly 25% of the population is Muslim. The word population is a collective noun that, depending on the author`s intention, can take either a singular verb or a pluralistic verb. This is to indicate that this percentage represents a single group. In your first sentence, the collective noun committee seems to act as a unit and in the second as an individual. The Committee considers these issues carefully. The committee led very different lives in private. Technically, since the 12th class acts as a unit in your first sentence, use the singularverb is. In your second sentence, class members act individually within the unit. So use the plural account.
However, these sentences could be better expressed than: 1st class 12. 2. The class expressed differing opinions on this matter. The phrase “some of” indicates a plural theme. So write “lawyers.” We use plural obstruction with collective nouns if we view the group as individuals who all do different things, or we want to emphasize the differences that occur in the group. Let`s take the following example: “A team trains. Train with two teams. I don`t see what`s complicated. Singular Substantiv = Singularverb; Plural noun = plural verblage. I read that the British feel collective names as a group of units, and that is why they use prural forms with them.
We can therefore conclude that grammar rules are not always based on logic. Here, each family member does something different. That is why we will use the plural code “are”. Let`s look at another example from the introduction. Note that Rule 6 of the subject and verb agreement is: “Generally use a plural bural with two or more subjects when connected by and there.” There are exceptions to this rule when the subjects or subjects in the sentence form a single entity or unit, a collective idea, or a unit of the idea. (They called it “the same thing,” but it might be too restrictive.) Examples we have seen, where a singular verb is used with two themes connected by and are “peanut butter and jelly is my favorite nack”, “Gain and loss are important for every business” and “spaghetti and meatballs go well with garlic bread”. In these cases, the interpretation of the “unity of the idea” rests essentially with the author of the sentence.