Help the grammar-obsessed supermarket manager fix the express lane signs.
If you want to survive the express checkout lane, you must have fewer than ten items in your cart and significantly less patience for people who try to pay with pennies.
If you want to survive the express checkout lane, you must have fewer than ten items in your cart and significantly less patience for people who try to pay with pennies.
Use fewer for countable nouns (things you can count one by one, like items, apples, or coins).
Use less for uncountable nouns (abstract concepts or bulk quantities, like patience, water, or time).
Countable and uncountable
Countable vs uncountable: countable nouns can be numbered and pluralised (one book, two books). Uncountable nouns can't (information, not informations). The distinction determines your choice of article, quantifier (much/many, few/little), and whether the noun can be plural.
Countable = takes a/an, has a plural, uses many/few. Uncountable = no a/an, no plural, uses much/little. Some nouns are both depending on meaning (coffee = the substance vs a coffee = a cup).
Diagnostic: can you say one ___, two ___s? Yes → countable. No → uncountable (use a unit phrase: a piece of, a bit of).
Determiner
Determiner vs adjective: both appear before a noun, but determiners specify which/how many while adjectives describe what kind. Determiners come first: the big cat (✅) vs big the cat (❌). You can stack adjectives (big fluffy cat) but generally only one determiner per noun.
A determiner is a function slot before a noun filled by articles, demonstratives, possessives, or quantifiers.
Diagnostic: does the word tell you which one or how many rather than what kind? → determiner. Does it describe a quality? → adjective.
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).
B2 | Upper Intermediate
B2 vs C1: B2 means effective communication on complex topics with some effort. C1 means effortless fluency with precise register control. If you can argue a point but still reach for words and make structural slips under pressure, you're B2.
B2 is the upper-intermediate CEFR level: mixed conditionals, complex passives, reported speech with backshift, participle clauses, and sustained written argument.
Diagnostic: does your writing read as "competent non-native" or "could be native"? The former → B2. The latter → C1.
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.