for example;He helped to build the roof. or. The officer returned to help the inspectors.
explanation of uses.
An infinitive can constitute the subject of a sentence. For example, in “To go, even after all that trouble, didn’t seem worthwhile anymore,” “to go” is the action that drives the sentence.
2. Direct Object
In the sentence “We all want to see,” “to see” is the direct object, the noun (or noun substitute) that receives the action of the verb. “To see” refers to a thing being done — or, in this case, desired to be done: the act of seeing.
3. Subject Complement
In “My goal is to write,” “to write” is the subject complement. A subject complement looks just like a direct object, but the difference is in the type of verb preceding it. The verb in the previous example, want, is a transitive verb. (Transitive verbs have two defining characteristics: They precede a direct object, and they express an action.)