22강 / Concept 022 / to부정사의 개념 및 용법

Summary

The lesson introduces the to-infinitive, focusing on its use as a noun. Although parts of the subtitles are heavily garbled, the main grammar points are clear.

1. What a to-infinitive is

A to-infinitive is formed by placing to before the base form of a verb: to read, to go, or to learn.

The lesson introduces three broad uses of the to-infinitive: noun, adjective, and adverb. This lecture covers only the noun use. Because the same form can serve different functions, its role must be identified from its position and meaning in the sentence.

2. Noun use: subject, complement, or object

A noun can function as a subject, complement, or object. A to-infinitive used as a noun can fill those same roles.

• Subject: The to-infinitive phrase occupies the subject position, before the main verb. Example: “To master English is not easy.”

• Complement: It follows a linking verb such as be and identifies or explains the subject. Example: “My dream is to master English.”

• Object: It follows a verb and completes its meaning. Common examples include wanting, hoping, planning, or deciding to do something.

The instructor often suggests initially understanding a noun-like infinitive as “doing something” or “to do something.” This is a practical interpretation aid, not a substitute for checking the sentence structure.

3. How to identify the function

The lesson recommends checking sentence structure first, then using interpretation as a supporting clue:

1. Find the sentence’s subject and main verb.
2. Check where the to-infinitive phrase appears:
   • Before the main verb: likely the subject.
   • After a linking verb, where it explains the subject: likely a complement.
   • After a verb that takes an object: likely the object.
3. Interpret the phrase naturally—often as “doing” or “to do”—to confirm its role.
4. Korean translation particles can offer rough clues: subject markers such as 은/는/이, complement-like “이다,” and object markers such as 을/를. These are learning aids, not perfect tests.

4. Learn common verb patterns

The instructor recommends learning frequent combinations as expressions, especially patterns such as:

• want to do
• hope to do
• plan to do
• decide to do

Knowing these patterns can help with comprehension and exam questions, even before a student can fully explain the grammatical label.

5. Practice and expectations

• The exercises ask students to decide whether an infinitive phrase is a subject, complement, or object, and to correct awkward or incomplete sentences.
• One example follows the structure “My plan is to drink water often,” with the infinitive phrase functioning as a complement.
• The instructor stresses that this method will not resolve every case, but provides a useful foundation. The topic will be revisited in later lessons alongside gerunds and other uses of the infinitive.

Speakers and source

• Speaker: One unnamed English grammar instructor; no guest speakers are identifiable in the subtitles.
• Source: 중학영어TV, according to the video metadata.