The key to exercise solutions in chapter 4.7 - Writing for the textbook Focus 5 - Workbook with authors Daniel Brayshaw and Tomasz Siuta from Pearson Education
Question
Underline the following structures which express purpose in review.
Two beginning with to + infinitive + noun phrase
One beginning with so that
One beginning with so as to
One beginning with for
Answer
to shoot jaw-dropping footage; to follow a small circular tracker
so that you and your mates can concentrate on avoiding that tree or landing that jump.
so as to send the camera hovering above you
for capturing active folk's adventures in high-definition.