Complete the homeowner's review of their overly dramatic smart fridge.
I recently purchased a brand-new smart fridge for my kitchen. Unfortunately, it refuses to open the doors after 8 PM! I tried complaining to the manufacturer, but they said it's a "dietary feature," not a bug.
I recently purchased a brand-new smart fridge for my kitchen.
Slavic languages often don't use articles. In English, we must use the indefinite article "a" when introducing a singular, countable noun for the first time. ("An" is incorrect here because "brand-new" starts with a consonant sound).
Unfortunately, it refuses to open the doors after 8 PM!
Even though a fridge might feel like it has a stubborn personality (and would have a grammatical gender like "he" or "she" in many Slavic languages), inanimate objects in English must be referred to as "it".
I tried complaining to the manufacturer...
In English, you complain to a person or company. Directly translating prepositions from other languages often leads to errors like complaining "at" or "with".
Article
Articles are a small group of determinatives that signal whether a noun refers to something specific (the book) or something general (a book). English has three: the definite article the, the indefinite articles a/an, and the zero article — the meaningful absence of any article (Coffee keeps me awake).
Articles are one of the trickiest parts of English for non-native speakers because the choice depends on context, not just the noun itself. Get them right and your writing instantly sounds more natural; miss them and even simple sentences feel "off" to a native ear.
Pronoun
A pronoun is a small, closed class of words that stands in for a noun or noun phrase. The main types: personal (I, you, he, she, it, we, they) plus their object (me, him) and possessive (my, mine) forms; demonstrative (this, that); relative (who, which, that); interrogative (who, what); and reflexive (myself, yourself).
Pronouns are how English avoids endlessly repeating names. The catch: their meaning depends entirely on context, so unclear pronoun reference (Tom told Mike that he was wrong — who's he?) is one of the most common writing problems.
Preposition
A preposition is a small word that links a noun or noun phrase to other parts of the sentence — usually marking time, place, or relationship: in, on, at, to, from, with, over, under, between, during. The book on the table, We met at noon, She lives in Berlin.
Prepositions are deceptively small. Their meaning shifts dramatically by collocation (depend on, good at, afraid of), and their choice rarely translates directly between languages. Picking the right preposition is one of the trickiest, most idiomatic-sounding parts of English.
Countable and uncountable
In English, nouns split into two groups based on whether you can count them. Countable nouns (chair, book, idea) take a/an, form plurals (chairs), and pair with many, few, several. Uncountable nouns (water, furniture, advice, information) take no article in their general sense, have no plural, and pair with much, little, some.
This distinction matters because it controls article choice, plural marking, verb agreement, and quantifier selection — fewer chairs vs less water, an advice (wrong) vs some advice. It's one of the most common error sources for learners from languages without this split.
Collocations
Collocations are combinations of words that habitually occur together in a fixed order — make a decision (not do a decision), strong coffee (not powerful coffee), heavy rain (not thick rain). The grammar would allow either pairing, but native speakers consistently pick one and reject the other. Common patterns include verb + noun, adjective + noun, adverb + adjective, and adverb + verb.
Learning vocabulary as collocations rather than isolated words is the single fastest way to sound natural in English. It's the difference between I made a big mistake and I did a big mistake — small, but immediately noticeable.
B1 | Intermediate
B1 is the intermediate level in the CEFR framework — the point where you stop relying on memorised phrases and start handling everyday English independently. At B1 you can describe experiences, explain opinions, and follow most clear standard speech on familiar topics like work, travel, and hobbies.
Grammatically, B1 means combining tenses with precision, building complex sentences, and starting to use passive voice, modal verbs for necessity and possibility, and verb patterns (gerund vs. infinitive). Knowing your level shapes what you study next: pushing too far ahead frustrates you; staying below your level wastes time.
Difficulty: Medium
The Medium difficulty tag marks questions and challenges in the middle of the difficulty range — typically suitable for A2 to B1 learners. Expect a single rule with realistic distractors, longer sentences, and contexts where you have to think before answering rather than reading off the obvious choice.
Filter by Medium when you're past the absolute basics and ready to consolidate. It's the level where most lasting progress happens — easy enough that you can finish without exhausting concentration, hard enough that getting it right means you've actually understood.