Why does riley fight with his piky and thumb out?

This is always in the form of "to" + a verb-like word. this verbal unit in a sentence actually acts as a noun, adjective, or adverb, rather than a verb. example: ("to carry," "to think," "to laugh")

Awell-written summary should be used o in place of reading an original text to you review something that you have already read

What does this excerpt explain about this setting