🔠 Word Formation: Suffixes
1ère Bac Sciences et Technologies Mécaniques STM
📌 Introduction
Suffixes are added to the end of words to change their meaning or grammatical function. They help form nouns, adjectives, verbs, and adverbs.
Example: “Science” (noun) → “Scientific” (-ic = adjective) → “Scientifically” (-ally = adverb)
📚 Common Suffixes
| Suffix | Function | Example |
|---|---|---|
| -tion / -sion | Noun (action) | inform → information |
| -er / -or | Noun (person) | teach → teacher |
| -ful | Adjective (full of) | care → careful |
| -less | Adjective (without) | hope → hopeless |
| -ly | Adverb | quick → quickly |
| -ous | Adjective | danger → dangerous |
| -al | Adjective | nature → natural |
Tip: Learn suffixes in groups by function — don’t memorize them randomly!
✅ Exercise 1: Match the Suffix
1. -ful →
2. -less →
3. -ly →
4. -tion →
5. -er →
✅ Exercise 2: Form the Noun
1. inform →
2. decide →
3. act →
4. create →
5. educate →
✅ Exercise 3: Form the Adjective
1. care →
2. danger →
3. beauty →
4. nature →
5. success →
✅ Exercise 4: Form the Adverb
1. quick →
2. careful →
3. easy →
4. beautiful →
5. scientific →
✅ Exercise 5: Choose the Correct Suffix
1. danger → danger___
2. care → care___
3. beauty → beaut___
4. inform → inform___
5. quick → quick___
✅ Exercise 6: Complete the Sentence
1. She is very ___ about her work.
2. The experiment was a great ___.
3. He solved the problem ___.
4. We need ___ information.
5. Her ___ made the project possible.
✅ Exercise 7: Correct the Mistake
1. She is very care about the environment. →
2. The success of the project was very high. →
3. He works quick. →
4. This is a science experiment. →
5. The decision was very difficultly. →
✅ Exercise 8: Science Context
1. The ___ results surprised everyone.
2. The ___ of the experiment was impressive.
3. We must ___ the environment.
4. The ___ made a new discovery.
5. The data was collected ___.
✅ Exercise 9: Real-Life Use
1. The ___ (create) of the app took months.
2. She is a ___ (success) scientist.
3. We must ___ (protection) the forest.
4. His ___ (decide) saved the project.
5. The water is ___ (danger).
✅ Exercise 10: Write a Sentence
Use the correct word form:
1. (discover)
2. (success)
3. (care)
4. (science)
5. (decide)
