What is the difference between compound a plural and collective subjects?

Answer 1

Compound subjects have at least two parts joined by or . . . nor, not only . . . but also, or and, as in snacks and fruit juice, and each part may be singular or plural. A plural subject has just one word as the simple subject, but that word is plural (like plates). Finally, a collective subject contains a simple subject representing a group (such as jury, which describes a group of twelve); the collective subject may be singular (jury) or plural (juries).

Answer 2

Compound subjects refer to multiple subjects that are joined by coordinating conjunctions such as "and" or "or," while plural subjects refer to subjects that are inherently plural and do not require conjunctions. Collective subjects refer to a single entity that is made up of multiple individuals or parts.