Where do you put a comma in coordinating word?

It seems you're asking about using commas with coordinating conjunctions. Here's the breakdown:

Coordinating Conjunctions (FANBOYS)

* For

* And

* Nor

* But

* Or

* Yet

* So

The Rule: You put a comma before a coordinating conjunction when it joins two independent clauses.

Independent Clauses: These are complete sentences that can stand alone.

Example:

* The cat sat on the mat, and the dog chased its tail.

* "The cat sat on the mat" is an independent clause.

* "The dog chased its tail" is an independent clause.

* "And" is the coordinating conjunction.

When you DON'T need a comma:

* When the conjunction joins two words or phrases:

* *The cat sat on the mat and under the table.*

* When the conjunction joins two dependent clauses:

* *Because the cat sat on the mat, and because the dog chased its tail, the house was in chaos.*

Key Takeaway:

Use a comma before a coordinating conjunction only when it joins two independent clauses. If you're unsure, try reading the clauses aloud; if they sound like complete sentences, a comma is likely needed!