What if my answers are correct?
If you find that all your answers match these, then your knowledge of and skills with adverb clauses are satisfactory.  Congratulations!

What if my answers to the sentence building exercises are incorrect?
If you find that some of your answers don't match these exactly, do not worry.  There are many ways to do these sentence combining exercises, some better than others.  Re-read the six qualities listed on p. 223: meaning, clarity, coherence, emphasis, conciseness, and rhythm.  If your sentences are different from the sentences below, check to see how your versions measure up to the qualities on p. 223.  As you look at your own answers, ask yourself the questions that you find with those six qualities.

Answers to Identifying Adverb Clauses Exercise on p. 247
The adverb clauses are underlined, and the key words are highlighted in blue.

1. You can register for the course in demonology if you first obtain the permission of the professor.
2. You can register for the course in demonology, but you must first obtain the permission of the professor.  (But is a coordinating conjunction, a.k.a. one of the fanboys, listed in Keywords #2.  The two clauses in this sentence are “coordinated.”)
3. Cinderella left the reception early because she was tired.
4. Wherever you go, I will follow.
5. Although the forest looks peaceful, it supports incessant warfare.
6. We gave away our dog so that we could get some sleep at night.

1. It is unlikely that Cleopatra actually committed suicide with an asp because the species is unknown in Egypt.

(Another possibility is since.)
2. On a hot mid-August evening, my parents and I watched in awe as erratic bolts of lightning from a distant storm illuminated the sky.

(You may have used when, while, or after.)
3. Although women are ill more frequently than men, they recover from illnesses more easily and more frequently than men.

(You could also use though or even though.)
4. Natural rubber is used chiefly to make tires and inner tubes because it is cheaper than synthetic rubber and has greater resistance to tearing when wet.
5. By ancient custom, when a Peruvian woman finds an unusually ugly potato, she runs up to the nearest man and smashes it in his face.

(Perhaps you used if, once, or as soon as to join these clauses together.)
6. One scarcely ever sees a sailboat or a hardy swimmer in these icy waters, though one does occasionally spot a seal, an otter, or a sperm whale.