Are there any rules for the third person singular and plural of action verbs?

Are there any rules for the third person singular and plural of action verbs?

On the simple three forms of V
Usually, S. is added after the verb, such as work → works
The verb ending with s, x, CH, SH is added with es. for example, teach → teachers
For verbs ending with a consonant letter and y, change y to I and add es, such as study → studies
For example, go → goes
○5 have → has