Compound Subjects:
* And: This is the most common joining word for compound subjects.
* Example: The dog and the cat played in the yard.
* Or: Used to indicate an alternative.
* Example: The boy or the girl will be chosen for the lead role.
* Nor: Used to indicate a negative alternative.
* Example: Neither the teacher nor the principal was present.
Compound Verbs:
* And: Used to show actions happening one after the other.
* Example: He ran and jumped over the fence.
* Or: Indicates a choice between actions.
* Example: You can eat or drink here.
* But: Shows contrast between actions.
* Example: She tried to run but tripped and fell.
Important Note: When you have compound subjects or verbs, the verb must agree with the subject closest to it.
* Example: The dog and cat are playing. (Both "dog" and "cat" are plural)
* Example: The dog or the cat is playing. (Verb agrees with "cat" which is singular)