Structure 2014-07-07 adverb clauses review and test

p. 347 ex 2
1 can't be shortened
2 Reg carefully considered the options before speeding away.
3 can't be shortened
4 Upon seeing a police car on the shoulder, Reg pulled over to alert the authorities.
5 can't be shortened
6 Thinking the Greens had precious stones, the criminals fired shots that killed Nicholas.

       before he saw -> before seeing
        after he saw -> after seeing
         when he saw -> upon seeing
while he was driving -> while driving

p. 350 ex 4
2 Upon taking a guidebook, the boy asked the tourists if they wanted a guidebook.
  Upon seeing the tourists, the boy asked...
  Seeing the tourists, the boy asked...
3 Not having any money, they couldn't buy a guidebook.
  Not having any money, they told the boy they couldn't buy the guidebook right then.
4 (Being) impressed by the boy, they began to reconsider buying a guidebook.
5 After deciding to buy a guidebook, they exchanged their money.
6 Having exchanged their money, they went searching for the boy.
  Having returned to the train station, they couldn't find the boy.
7 After looking for the boy, they asked the police officer if he knew where the boy was.
8 Having found the boy, they finally bought the guidebook.

p. 331 ex 3
2 Although Greek city-states...another, Olympic...games.
= Despite the fact that Greek city-states...
3 The ancient...Theodosius I even though they had...years.
4 He outlawed them in 393 because Romans thought the Greeks wore too few clothes.
5 French educator...Olympics because he thought...peace.
6 ...in 1920 because American and British...
7 ...demonstration events before they are adopted...
8 ...medal event if it can be scored...
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TEST
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*They are not likely to buy our products unless teenagers are targeted by marketing specifically.

Unless they are targeted by marketing specifically, teenagers are not likely to buy our products.
Teenagers are not likely...unless they are targeted...
Unless teenagers are targeted, they are not likely...

If the MAIN clause is before the ADVERB clause, you shouldn't use a pronoun that refers to something explained in the adverb clause.

After he got home, John made dinner.
(John got home, John made dinner)

He made dinner after John got home.
(Another person made dinner, John got home.)