The detective continued to search for the missing girl.
infinitive: to search.
infinitive phrase: to search for the missing girl.
Just when he started to doubt his plan, he found the scared young girl behind the door to the cabin.
infinitive: to doubt.
infinitive phrase: to doubt his plan.
"’I see we'll have to do it the hard way
Explanation:
its a classic line that many authors use that line would be the best out of the four to grow suspense
