APIE
B1CEFRGrammar12 min

Gerund vs Infinitive: Enjoy Doing, Decide To Do

Gerunds and infinitives

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⚡ B1 Fitness Grammar Unit: Health & Fitness

🏋️ Gerunds (-ing) & Infinitives (to + Verb)

Train your language muscle: learn exactly when to use an -ing verb or a to-infinitive while talking about workouts, diets, and active habits.

T

Teacher's Corner

  • ⏱️ Allocate 12 minutes for guided study and individual drill completion.
  • 🎯 Focus correction on verb patterns rather than punctuation or capitalization.
S

Learner's Guide

  • 📖 Review the 4-row workout rule table below before starting any questions.
  • ✍️ Complete all 12 practice tasks to lock in your fitness vocabulary.
Quick Rules

Core Workout Grammar Table

# Grammar Rule Key Fitness Verbs Exact Model Sentence
01 Verbs followed by Gerund (-ing) enjoy, avoid, keep I enjoy swimming.
02 Verbs followed by Infinitive (to-V) decide, want, need I decided to run every morning.
03 Prepositions followed by -ing good at, interested in, tired of She is good at running.
04 Verbs taking Both Forms like, love, start I like running. I like to run.
💡 Vocabulary focus: exercise, workout, muscle, active, diet, habit, balanced, stress, energy, recover.
1

Part 1 • Choose the Best Sentence

Item 1 (enjoy)

Which sentence correctly uses "enjoy" with physical training?

____ A. I enjoy doing a heavy workout. ____ B. I enjoy to do a heavy workout.
Item 2 (decide)

Which sentence correctly describes a healthy nutrition decision?

____ A. He decided to follow a balanced diet. ____ B. He decided following a balanced diet.
Item 3 (like)

Which sentence is grammatically acceptable?

____ A. They like staying active on weekends. ____ B. They like to stay active on weekends. ____ C. Both sentences are correct.
2

Part 2 • Complete the Sentences

Item 4 (in)

She is interested in ____ her energy levels. (boost)

Item 5 (avoid)

Try to avoid ____ too much stress at work. (feel)

Item 6 (need)

Your muscles need ____ properly after training. (rest)

3

Part 3 • Sentence Rewriting

Rewrite each faulty sentence so it follows the correct verb pattern.

Item 7 (keep)
❌ Incorrect: "You should keep to exercise every day."
Write the correct sentence: ____
Item 8 (want)
❌ Incorrect: "He wants building bigger muscles."
Write the correct sentence: ____
Item 9 (at)
❌ Incorrect: "She is good at to build healthy habits."
Write the correct sentence: ____
4

Part 4 • Fix Errors in Alex's Workout Chat

💬 Message from Coach Alex
"Hey teammate! You know I [10] love go to the gym every afternoon. Yesterday I had low energy and [11] decided skipping my balanced diet. Now I feel exhausted and I'm [12] tired of to workout with sore muscles. What should I do to recover?"
Item 10 (love)

Correct the underlined error "love go":

____
Item 11 (decide)

Correct the underlined error "decided skipping":

____
Item 12 (of)

Correct the underlined error "tired of to workout":

____
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