Introduction: The Magic of Expanding Your English – Infinitives and Gerunds
Hello! As you continue your English studies, you’ll likely find moments where you want to provide more detail—like saying "to do something" or "for the purpose of doing something." That’s where the "infinitive (to + base form of the verb)" and the "gerund (verb + -ing)" become incredibly useful tools.
Mastering these two will instantly add variety to what you can express. You might feel a bit unsure about which one to use at first, but don't worry—once you get the hang of it, it becomes second nature. Let’s take it slow and steady at your own pace!
1. The Three Faces of the Infinitive (to + base form)
The infinitive is like a magical form that transforms a verb into a "noun," "adjective," or "adverb" by placing to in front of it.
① Acting as a Noun (to do something)
In this form, it means "doing something" and acts as the subject or object of a sentence.
To play soccer is fun.
I want to eat pizza. (I desire the act of eating pizza.)
② Acting as an Adjective (to do / intended for)
Place it after a noun to explain "what kind of" noun it is.
I want something to drink. (I want something that is for drinking.)
I have a lot of homework to do. (I have a lot of homework that I must do.)
③ Acting as an Adverb (in order to / because of)
This expresses "purpose" or the "reason for an emotion."
I went to the library to study.
I am happy to see you. (I am happy because of seeing you.)
【Pro Tip】
The infinitive is always to + base form. Be careful—it never changes to forms like to plays or to played!
2. Gerunds (-ing form): The Experts of "Doing Something"
A gerund is formed by adding -ing to the end of a verb, turning it into a noun that means "doing something."
Examples of Use
Playing tennis is exciting.
My hobby is cooking.
I enjoyed listening to music.
【Nugget of Wisdom】 What’s the difference from an infinitive?
While they both can mean "doing something," gerunds have a stronger nuance of "the actual, vivid experience of an action" or "something currently happening or already experienced."
3. Which one to use? "to do" vs "doing"
This is a common target for test questions! Depending on the verb, some only take an infinitive, while others only take a gerund.
① Verbs that love the Infinitive (to do)
want, hope, decide, promise, etc.
These verbs often look toward "the future" or things yet to happen.
× I want eating. → ○ I want to eat.
② Verbs that love the Gerund (doing)
enjoy, finish, stop, practice, etc.
These verbs are often related to "what you are currently doing" or "actions from the past."
× I enjoy to swim. → ○ I enjoy swimming.
【Memorization Hack!】
A popular way to remember verbs that only take gerunds is the acronym "MEGAFEPS"!
M (mind), E (enjoy), G (give up), A (avoid), F (finish), E (escape), P (practice/postpone), S (stop/suggest)
4. The "It is ... for A to 〜" Structure
This is a convenient way to say, "For A (someone), it is ... to do ~."
\( \text{It is } + \text{adjective} + \text{ for } + \text{ (person) } + \text{ to } + \text{base form of verb} \)
It is important for us to learn English.
【Common Mistake】
Using To learn English is important for us. is not grammatically wrong, but English speakers dislike sentences where the subject is too long. That’s why we use It as a "placeholder" subject to make the sentence flow better.
5. The "tell / want + person + to do" Structure
This is a highly useful pattern for communication, meaning "tell someone to do something" or "want someone to do something."
\( \text{S} + \text{V} + \text{person} + \text{ to } + \text{base form of verb} \)
My teacher told me to study hard.
I want you to help me.
【Summary: Key Points】
- Infinitives use "to + base form" to act as nouns, adjectives, or adverbs!
- Gerunds use "-ing" to function as a noun, meaning "doing something"!
- want to 〜 (future-oriented) vs. enjoy 〜ing (enjoying the act itself)!
- Remember the It is ... for A to 〜 structure as a set!
It’s normal to get a little confused about which is which at first, but as you read these examples out loud repeatedly, you’ll start to remember them naturally through the rhythm of the language. Don’t rush—keep practicing little by little. You've got this!