What are the usage differences between that of and those of?

Understanding the differences between 'that of' and 'those of' is essential for clear and effective communication in English. Both phrases serve to relate or refer to something previously mentioned, but they are used in different contexts and grammatical structures.

Here’s a breakdown of the usage differences:

1. That of: This phrase is typically used to refer to a singular noun or concept. It emphasizes ownership or association. For example, you might say, 'The quality of the painting is better than that of the sculpture.' Here, 'that of' refers specifically to the quality of the singular noun 'sculpture.'
2. Those of: In contrast, 'those of' is used to refer to plural nouns. It indicates a comparison or relationship involving multiple items or concepts. For instance, 'The opinions of the students were different from those of the teachers.' In this case, 'those of' refers to the opinions held by the plural noun 'teachers.'

In summary, use 'that of' when discussing a singular subject and 'those of' when referring to plural subjects. This distinction helps maintain clarity in your writing and ensures that your audience understands which specific items or concepts you are discussing.