A complex sentence has one main (or independent) clause and one (or
more) subordinate (or dependent) clauses.
In each sentence, the main clause is underlined, and the subordinate clause
is in italics.
After the storm subsided, we went out to inspect the grounds.
The ticket that you received in the mail is the right one.
You will be able to ride with us unless you would rather take the train.
If the trees shed their leaves during the next two weeks, I could use some
help with the raking.