COMMA USAGE
Items in a Series
​Examples:
Tendai, Rita, and Kuda live in a home where robots do everything for them.
The parents call the Ear, the Eye, and the Arm Detective Agency.
Introductory phrase
​Examples:
After that, they were taken to the Vlei.
On their journey, they get kidnapped.
With the help of the She-Elephant’s hidden kindness, they’re freed.
After tiring work, they finally escape.
 
Non-examples:
The She-Elephant brings them to the Masks where they are prepared to die.
Interrupter
​Examples:
Tendai and his siblings, Rita and Kuda, went out to buy items for their trip.
There are three detectives, who happen to have special abilities, who are sent to find them.
I, c I

Coordinating Conjunctions
for
and
nor
but
or
yet
so
​Examples:
The children escape to Resthaven, but they find that it is an unhappy place.
The Masks take them, and then the detectives get them back.
They call the children’s father, and he takes care of the Masks.
 
Non-examples:
They end up in Resthaven but are quickly kicked out.
They were kidnapped by the Vlei people and were sent to a place where they were forced to mine plastic.
D, I or ​ID

Subordinating Conjunctions
since
when
after
because
if
while
unless
until
before
although
​Examples:
After they leave Resthaven, the children go to Borrowdale to find the Mellower's home.  OR  The children go to Borrowdale to find the Mellower's home after they leave Resthaven.

When the children are handed over to the Masks, She-Elephant begins to regret giving them up.  OR  She-elphant begins to regret giving them up when the children are handed over to the Masks.