Complex Sentences: 'который', 'потому что', 'чтобы'

In this lesson, we will explore how to connect ideas in Russian by forming complex sentences. A complex sentence contains a main clause and one or more subordinate (dependent) clauses. We will focus on three essential conjunctions that help build these sentences: 'который', 'потому что', and 'чтобы'.

📌 A key rule to remember is that in written Russian, a subordinate clause is almost always separated from the main clause by a comma.

🔹 Который (who, which, that)

'Который' is used to introduce a clause that gives more information about a noun in the main clause. Think of it as a bridge connecting a noun to its description.

The most important thing about 'который' is that it changes its form. It's a true chameleon! Its form must agree with the noun it describes in two ways:

1. Gender (masculine, feminine, neuter)
2. Number (singular, plural)

However, its case (Nominative, Accusative, Genitive, etc.) depends on its grammatical role within its own clause (the subordinate clause).

Let's see how it works:

➡️ Nominative Case (when 'который' is the subject of the clause)

• Masculine: Это мой друг, который живёт в Москве. (This is my friend who lives in Moscow.)
• Feminine: Это моя подруга, которая работает в банке. (This is my friend who works in a bank.)
• Neuter: Это здание, которое стоит в центре. (This is the building which stands in the center.)
• Plural: Это студенты, которые учат русский язык. (These are the students who are learning Russian.)

➡️ Accusative Case (when 'который' is the direct object)

• Masculine (inanimate): Вот стол, который я купил. (Here is the table that I bought.)
• Masculine (animate): Вот актёр, которого я видел вчера. (Here is the actor whom I saw yesterday.)
• Feminine: Я читаю книгу, которую ты мне дал. (I am reading the book that you gave me.)
• Neuter: Я смотрю фото, которое ты сделал. (I am looking at the photo that you took.)
• Plural: Я знаю людей, которых вы встретили. (I know the people whom you met.)

➡️ Genitive Case (often used with 'нет' or to show possession)

• Это человек, у которого есть новая машина. (This is the person who has a new car. Literally: at whom there is a new car.)
• Это фирма, у которой нет сайта. (This is the company that doesn't have a website.)

Mastering 'который' is a big step. Always ask two questions:

1. What noun am I describing? (This gives you gender and number.)
2. What is its role in the second part of the sentence? (This gives you the case.)

🔹 Потому что (because)

This conjunction is much simpler! 'Потому что' is used to introduce a clause that explains the reason or cause for the action in the main clause. It's the direct equivalent of 'because'.

The structure is straightforward: [Main Clause], потому что [Reason Clause].

✅ Examples:

• Я устал, потому что я много работал. (I am tired because I worked a lot.)
• Она не пошла в кино, потому что у неё не было времени. (She didn't go to the cinema because she didn't have time.)
• Мы говорим по-русски, потому что мы живём в России. (We speak Russian because we live in Russia.)

🔹 Чтобы (in order to, so that)

'Чтобы' is used to express purpose or a goal. It explains why someone does something. There are two common structures you need to know.

➡️ Structure 1: чтобы + Infinitive
This is used when the subject of the main clause and the subordinate clause is the same person.

• Я учу русский язык, чтобы читать Достоевского. (I am learning Russian in order to read Dostoevsky.)
• Он пошёл в магазин, чтобы купить хлеб. (He went to the store in order to buy bread.)

➡️ Structure 2: чтобы + [Subject] + Past Tense Verb
This structure is used when the subjects of the two clauses are different. It often expresses a wish, request, or purpose for someone else. Even if you are talking about the future, you must use the past tense form of the verb after 'чтобы' in this structure. This is a form of the subjunctive mood.

• Я хочу, чтобы ты мне помог. (I want you to help me. Lit: I want so that you helped me.)
• Мама сказала, чтобы я сделал домашнее задание. (Mom said that I should do my homework. Lit: Mom said so that I did my homework.)
• Важно, чтобы все пришли вовремя. (It is important that everyone arrives on time. Lit: It is important so that everyone arrived on time.)

To summarize:

• Который describes a noun.
• Потому что explains a reason.
• Чтобы explains a purpose.