In English, adverbs describe how an action is done. 'She walks slowly.' 'He speaks clearly.' 'They work hard.' Most adverbs are built from adjectives by adding the suffix -ly. 'Slow' (adjective) becomes 'slowly' (adverb). 'Clear' becomes 'clearly'. 'Quick' becomes 'quickly'. The rule is simple but has spelling changes for some endings. 'Happy' (ending in -y) becomes 'happily' (y changes to i). 'Simple' (ending in -le) becomes 'simply' (drop the e and add -ly). And a few important adjectives have irregular adverb forms — 'good' becomes 'well' (not 'goodly'), and 'fast' stays 'fast' (not 'fastly'). Students who know the -ly rule and the small set of irregulars can produce most adverbs accurately. This lesson covers the rule, the spelling changes, and the irregular forms students need at A2 level.
Before you start — think honestly about your own teaching and experience.
Look at the examples. Answer each question before reading the explanation — this is how your students will learn too.
quick (adjective) → quickly (adverb): She finished her work quickly.
slow (adjective) → slowly (adverb): The bus moved slowly through the traffic.
clear (adjective) → clearly (adverb): Please speak clearly.
bright (adjective) → brightly (adverb): The sun shone brightly.
careful (adjective) → carefully (adverb): He drove carefully on the wet road.
clever (adjective) → cleverly (adverb): She answered cleverly.
The pattern is: adjective + ly = adverb. Why does English need adverbs at all? Why not just use the adjective?
Adjectives describe nouns — 'a quick runner', 'a careful driver'. Adverbs describe verbs — 'she runs quickly', 'he drives carefully'. The two jobs are different. 'He is quick' (adjective describing him) and 'he runs quickly' (adverb describing how he runs). Without adverbs, students cannot describe actions properly. The -ly suffix is the most common way to build adverbs from adjectives. The pattern is highly productive — most adjectives can become adverbs by adding -ly. Students who understand the rule can build hundreds of adverbs from the adjectives they already know. The teaching point: when you describe a verb (an action), you usually need an adverb. Most adverbs are built by adding -ly to the adjective.
-y endings — change y to i:
happy → happily (not happyly)
easy → easily (not easyly)
busy → busily
lazy → lazily
angry → angrily
-le endings — drop the e and add -y (just -y, not -ly):
simple → simply (not simplely or simplly)
possible → possibly
true → truly (true drops the e too!)
gentle → gently
terrible → terribly
-ic endings — add -ally:
basic → basically
automatic → automatically
specific → specifically
dramatic → dramatically
Why do some adjectives change spelling when adding -ly? What is the pattern?
The spelling changes follow rough patterns based on the ending of the adjective. Adjectives ending in consonant + y change y to i before -ly: happy + ly = happily, easy + ly = easily, angry + ly = angrily. Adjectives ending in -le drop the e and add only -y (because the l is already there): simple → simply, possible → possibly, terrible → terribly. Adjectives ending in -ic usually add -ally (with two l's): basic → basically, automatic → automatically. These patterns are not perfect rules — there are exceptions — but knowing the patterns helps students get the spelling right. Drilling the most common adverbs as fixed spellings (happily, easily, simply, basically) is reliable. Students should not try to apply rules in real time — they should learn the spellings as fixed.
good → well (not goodly!)
She sings well.
He plays football well.
The team did well in the match.
fast → fast (no change)
She runs fast.
He drives fast.
hard → hard (no change — but careful with 'hardly')
They work hard every day.
She studies hard for her exams.
Watch out — 'hardly' has a different meaning:
She hardly studies. (= almost never studies)
I can hardly hear you. (= almost cannot hear)
Why are these irregular? What do students need to know?
A small group of important adjectives have irregular adverb forms. 'Good' becomes 'well' — not 'goodly'. This is one of the most important irregulars to learn because 'good' is so frequent. 'She plays well' (correct), 'She plays good' (very common error). 'Fast' has the same form as adjective and adverb — 'a fast car' (adjective), 'she drives fast' (adverb). 'Fastly' is not English. 'Hard' is similar — 'hard work' (adjective), 'work hard' (adverb). But 'hardly' exists as a different word with a completely different meaning — 'I hardly know him' (= almost do not know him). Students often confuse 'hard' (with effort) and 'hardly' (almost not). The teaching point: drill these irregular forms specifically. They do not follow the -ly rule, and using -ly with them produces wrong English.
| Pattern | Description | Examples | Notes |
|---|---|---|---|
| Adjective + ly | The basic rule for most adverbs | quick → quickly, slow → slowly, careful → carefully, clever → cleverly, bright → brightly, kind → kindly | This is the default pattern. Works for most adjectives. |
| -y → -ily | For adjectives ending in consonant + y | happy → happily, easy → easily, busy → busily, lazy → lazily, angry → angrily, hungry → hungrily | Change the y to i, then add -ly. 'Happyly' is wrong. |
| -le → -ly (drop e) | For adjectives ending in -le | simple → simply, possible → possibly, gentle → gently, terrible → terribly, true → truly | Drop the final -e and add -y (the l is already there). |
| -ic → -ically | For adjectives ending in -ic | basic → basically, automatic → automatically, specific → specifically, dramatic → dramatically | Add -ally (with two l's), not just -ly. |
| Irregular: good → well | One of the most important irregulars | She plays well. He sings well. The team did well. | Common error: 'plays good' (wrong) → 'plays well' (right). |
| No change: fast, hard, late, early | Same form for adjective and adverb | a fast car / she runs fast | hard work / work hard | a late train / arrive late | an early start / start early | Adding -ly to these is wrong: 'fastly', 'lately' (different meaning), 'earlily' all wrong. |
| Hardly — different meaning | Looks like an adverb of 'hard' but means 'almost not' | I hardly slept last night. She hardly speaks in class. | Different from 'hard' (= with effort). 'Hardly' = almost not. |
| Some -ly words are adjectives, not adverbs | A few -ly words describe nouns | a friendly person, a lovely day, a lonely man, a daily lesson, a weekly meeting | These are adjectives (describe nouns), not adverbs (describe verbs). They look like adverbs but are not. |
PATTERN 1 — The basic rule: Add -ly to the adjective to make an adverb. Quick + ly = quickly. Slow + ly = slowly. Careful + ly = carefully. Most adjectives follow this rule directly with no spelling change. Students who learn the basic rule can build many adverbs immediately.
PATTERN 2 — -y to -ily: Adjectives ending in consonant + y change the y to i before adding -ly. Happy → happily. Easy → easily. Busy → busily. The rule is the same as for the comparative (happy → happier). Students who know one rule know the other.
PATTERN 3 — -le to -ly (drop the e): Adjectives ending in -le drop the final -e and add just -y (the l is already there). Simple → simply. Possible → possibly. Gentle → gently. The pattern is fixed.
PATTERN 4 — -ic to -ically: Adjectives ending in -ic add -ally (with two l's). Basic → basically. Automatic → automatically. Specific → specifically. Just adding -ly would give 'basicly' which is wrong. The double-l form is correct.
PATTERN 5 — Irregular adverbs: A small but important group of adverbs is irregular. Good → well (not goodly). Fast → fast (no change, not fastly). Hard → hard (no change). Late → late (no change). Early → early (no change). These must be memorised — the rule does not work for them.
PATTERN 6 — Hard vs hardly: Hard (no -ly) means with effort: 'work hard'. Hardly (with -ly) means almost not: 'hardly work' (= almost do not work). The two words have very different meanings. Students often confuse them and produce wrong sentences.
PATTERN 7 — Some -ly words are adjectives: A small set of words ending in -ly are adjectives, not adverbs. Friendly, lovely, lonely, ugly, daily, weekly, monthly. They describe nouns: 'a friendly person', 'a lovely day'. They cannot describe verbs. To describe how someone acts in a friendly way, English uses 'in a friendly way' or 'in a friendly manner'.
Adverb formation is one of the most useful word-building patterns at A2 and B1 level. Students who master the -ly rule and the irregular forms can produce hundreds of adverbs from the adjectives they already know. The most common error is using the adjective form when an adverb is needed: 'she sings beautiful' instead of 'she sings beautifully'. Drilling the basic rule and the small set of irregulars (well, fast, hard) gives students the tools for accurate adverb use. The 'hardly' vs 'hard' distinction is worth specific attention because the meanings are so different. Cultural context: in everyday speech, native speakers sometimes use adjective forms for adverbs (he played good) but in writing this is wrong.
Build a wall display with the four main patterns: BASIC (-ly), -Y → -ILY, -LE → -LY (drop e), -IC → -ICALLY, and IRREGULAR (good/well, fast, hard). Each time students meet a new adverb, add it to the right column. Reviewing the wall regularly helps students see the patterns and build adverb-formation reflexes.
Complete each sentence with the correct adverb form of the word in brackets.
Each sentence has the wrong form of an adverb. Find the error, write the correct form, and explain.
Use this sequence directly in class — guided discovery, no textbook needed. Tap each step to mark it done.
STEP 1 — The basic rule (5 min): Write 'quick' on the board. Then write 'quickly'. Show that adding -ly turns the adjective into an adverb. Adjectives describe nouns (a quick runner). Adverbs describe verbs (he runs quickly). Drill five more pairs: slow/slowly, careful/carefully, kind/kindly, clever/cleverly, bright/brightly.
STEP 2 — Spelling changes (7 min): Show the three main spelling rules. -Y → -ILY: happy → happily, easy → easily, busy → busily. -LE → -LY: simple → simply, possible → possibly, gentle → gently. -IC → -ICALLY: basic → basically, automatic → automatically. Drill each pattern with five examples. Warn against errors: 'happyly', 'simpley', 'basicly' — all wrong.
STEP 3 — Irregular adverbs (5 min): Introduce the small set of irregulars. GOOD → WELL (not goodly). FAST → FAST (no change). HARD → HARD (no change, but watch out for 'hardly' = almost not). LATE → LATE (no change). EARLY → EARLY (no change). Drill with example sentences for each.
STEP 4 — The 'hard' vs 'hardly' trap (4 min): Show the meaning difference. Hard = with effort: 'work hard'. Hardly = almost not: 'hardly work'. Practise five examples mixing the two: 'I work hard' / 'I hardly work' / 'She studies hard' / 'She hardly studies'. Discuss the very different meanings.
STEP 5 — Describe how you do things (4 min): Each student produces five sentences about how they do things, using five different adverbs. 'I walk to school slowly.' 'I do my homework carefully.' 'I sing well.' 'I run fast.' Share in pairs. Partner checks: was the right form used? Any spelling errors?
Use directly in class — copy, adapt, or read aloud. No printing needed.
For each strategy, choose the option that best describes where you are now.
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