🔧 Lesson 2.1: Gerunds & Infinitives

Two Ways to Follow a Verb

When one verb follows another, the second verb has to take a shape. English gives it two main options:

• the gerund — the -ing form used as a noun: cooking, learning, waiting
• the infinitive — to + base verb: to cook, to learn, to wait

The tricky part is that the choice usually depends on the first verb, not on any rule you can hear. Enjoy demands -ing; want demands to. Compare:

So part of this is memory — but only part. Prepositions, subjects, and purpose all follow clear, learnable rules, and even the "both forms" verbs have a logic you can feel once you see it. Here's the map of the whole territory:

graph TD
    A["Second verb after another word"] --> B["-ing (gerund)"]
    A --> C["to do (infinitive)"]
    B --> D["after enjoy, avoid, finish..."]
    B --> E["after a preposition"]
    B --> F["as the subject"]
    C --> G["after want, decide, hope..."]
    C --> H["after an adjective"]
    C --> I["to show purpose (why)"]
                

The Gerund (-ing)

The gerund is a verb doing a noun's job. There are three main places it shows up.

1. After certain verbs

A cluster of common verbs — many about starting, stopping, continuing, avoiding, or feeling about an activity — takes the gerund:

• enjoy — I enjoy reading.
• avoid — She avoids driving at night.
• finish — Have you finished eating?
• mind — I don't mind waiting.
• suggest — He suggested taking a break.
• imagine — Imagine living there.
• consider — We're considering moving.
• keep — Keep trying.
• practice — I practice speaking daily.
• miss — I miss seeing them.

2. After a preposition

This one is a hard rule: any verb straight after a preposition takes -ing — always. Prepositions include at, in, on, of, about, for, after, before, without, instead of, good at, interested in, tired of, keen on…

⚠️ Watch the little word to: sometimes to is a preposition, not part of an infinitive — and then it takes -ing! "I look forward to hearing from you," "I'm used to getting up early," "She's committed to helping." If you can put a noun after it ("look forward to the weekend"), the to is a preposition → use -ing.

3. As the subject of a sentence

When an activity is the subject — the thing the sentence is about — use the gerund, not the infinitive:

The Infinitive (to do)

The infinitive — to + base verb — also has three main homes.

1. After certain verbs

Many verbs about wanting, planning, deciding, hoping, and trying/agreeing to do something take the infinitive:

• want — I want to go.
• decide — We decided to stay.
• hope — I hope to see you.
• promise — He promised to call.
• agree — They agreed to help.
• offer — She offered to drive.
• refuse — I refuse to lie.
• manage — We managed to finish.
• learn — I learned to swim.
• seem — You seem to know.
• afford — We can't afford to wait.

2. After adjectives

When an adjective is followed by a verb, that verb usually takes the infinitive:

3. The infinitive of purpose

To say why you do something — the reason or goal — use the infinitive. It answers "What for?" and means the same as in order to / so as to:

Verb + Object + Infinitive

A large group of verbs about influencing people — wanting, asking, telling, advising, allowing — follows the pattern verb + someone + to do:

Same Verb, Different Meaning

This is the heart of the lesson. A small group of verbs can take either form — but the two forms mean different things. Choose wrong and you say something you don't mean. The pattern to feel: the gerund often looks back at a real action/experience, while the infinitive often looks forward to a purpose, duty, or attempt.

Three more that work the same way, briefly:

🔊 Hear It & Repeat — Model Sentences

Listen to each model sentence, then say it back. Use the 🎧 Audio control (bottom-right) to choose a UK or US voice and slow the speed down. Watch which verbs take the -ing form, which take to, and how the meaning can shift.

Practice & Project

Tips & Common Mistakes

✅ Do's

• After any preposition — including to when it's a preposition — reach for -ing, every time.
• Use the infinitive of purpose ("to buy", not "for buying") to say why.
• For remember / forget / stop / try, pause and ask: is this a memory/activity (-ing) or a duty/purpose/attempt (to)?
• Read and listen widely — the verb + verb combinations sink in through exposure, not just lists.

❌ Common Mistakes

📓 Learning Journal

📝 Lesson Summary

🎉 What You've Accomplished

You've turned one of the messiest corners of English grammar into a set of patterns you can actually use. You know the reliable rules (prepositions, purpose, subjects), you know the useful hooks (forward-looking to, activity-as-a-thing -ing), and — most valuable of all — you can now say exactly what you mean with remember, stop, and try. That precision is pure B2. 🎉

❓ Common Questions at This Stage

🔭 Looking Ahead

You've been talking about real actions and choices. Next we turn to speculation about the past. In Lesson 2.2, you'll learn the modals of deduction in the past — must have, might have, can't have — to make confident guesses about what happened when you weren't sure ("She's not answering — she must have gone out").

✅ Before the Next Lesson

• Say five things you enjoy doing and five things you want to do this year — out loud.
• Find three sentences in something you read today that use a gerund or infinitive, and note which pattern each one is.
• Write your Learning Journal entry for this lesson.