Help the alien choose a new spaceship by selecting the grammatically correct word or phrase.
The X-9000 model is incredibly fast, but the Z-200 is definitely ______ for long trips across the galaxy.
The correct answer is more comfortable.
For long adjectives (usually three or more syllables, like com-fort-a-ble), we form the comparative by adding more before the adjective. We never add "-er" to the end of these long words, and we certainly don't use both!
Adjective
Adjective vs adverb: both describe things, but adjectives attach to nouns while adverbs attach to verbs. A quick answer (adjective → noun) vs answered quickly (adverb → verb).
An adjective modifies a noun or pronoun — telling you what kind, which one, or how many: a red car, something useful, three heavy boxes.
Diagnostic test: if the word describes a thing or person, use the adjective form. If it describes an action, you need the adverb (-ly) form instead.
Comparative and superlative
Comparative vs superlative: comparative compares two things (taller than); superlative picks the extreme from three or more (the tallest). If there are only two options, never use the superlative — the taller of the two, not the tallest of the two.
Comparatives use -er or more; superlatives use -est or most. Short adjectives take suffixes; longer ones take more/most. A small irregular set (good/better/best) follows no pattern.
Diagnostic: how many items are being compared? Two → comparative. Three+ → superlative. Also: never double up (more better is always wrong).
A2 | Elementary | Pre-intermediate
A2 vs B1: A2 handles routine transactions and simple past narration. B1 handles connected discourse, explaining reasons, and understanding main points in clear standard speech. If you can tell what happened but not why it matters, you're still A2.
A2 is the elementary level of the CEFR: past simple, present perfect, first conditional, basic modals, and routine communication about familiar topics.
Diagnostic: can you link ideas with because, although, so that and hold a conversation beyond scripted topics? No → A2. Yes → moving into B1.
Medium
Medium vs Easy: Easy has one obviously correct answer and clearly wrong distractors. Medium has one correct answer but plausible distractors — you need to actually know the rule, not just guess from sound.
The Medium tag filters for A2–B1 challenges with realistic difficulty: one rule per question, plausible alternatives, everyday contexts.
Diagnostic: if you're scoring 90%+ on Easy, move here. If you're below 60% on Medium, go back to Easy for that topic. Target 70–80% accuracy for maximum learning.