Question 1

What part of speech is чем in this sentence, and what role does it play?

Accepted Answer

Here, чем is a conjunction meaning “than.” It links the comparative adjective сложнее with the thing being compared (правило). Unlike a preposition, it does not govern a case; it simply introduces the second element of comparison.

Question 2

Why is правило in the nominative case after чем rather than instrumental or genitive?

Accepted Answer

Since чем here is a conjunction, the noun that follows stays in its base (nominative) form. Russian actually has two ways to form comparisons:
1) Adjective‑comparative + чем + nominative (formal/clear):  
   Конструкция сложнее, чем правило.  
2) Adjective‑comparative + genitive (colloquial):  
   Конструкция сложнее правила.  
With чем you keep the nominative; if you drop чем, you switch the second noun to genitive.

Question 3

Can I omit чем and say Конструкция сложнее правила instead?

Accepted Answer

Yes. Omitting чем gives you the more colloquial structure сложнее + genitive (правила). It’s grammatically correct, but in formal or written Russian the pattern with чем + nominative is often preferred for clarity.

Question 4

Why is there a comma before чем, whereas English usually doesn’t separate “than” with a comma?

Accepted Answer

In Russian, you place a comma before чем when the second part of the comparison functions as its own (elliptical) clause—here, (чем [она сложна]) is implied. If you use the genitive pattern without чем, you do not use a comma:  
Конструкция сложнее правила.

Question 5

How is the comparative form сложнее built, and can I instead use более сложная?

Accepted Answer

Сложнее is the synthetic comparative of сложный, formed by adding -е to the stem. You can also use the analytic form with более (more):  
Конструкция более сложная, чем правило.  
However, the one‑word comparative сложнее is shorter and more idiomatic in most contexts.

Question 6

How would you express “The rule is simpler than the construction” in Russian?

Accepted Answer

You have two main options:  
1) With чем + nominative:  
   Правило проще, чем конструкция.  
2) Without чем, using genitive:  
   Правило проще конструкции.

Question 7

Why is чем spelled with е here and not ё?

Accepted Answer

The conjunction/instrumental form чем (than) is always spelled with е in modern Russian. The form чём (with ё) exists only as the prepositional of что (“about what”), e.g., о чём ты думаешь?, but not in comparisons.

Question 8

Where does the stress fall in конструкция and правило?

Accepted Answer

In конструкция the stress is on the third syllable: кон‑струк‑ци́‑я.  
In правило the stress is on the second syllable: пра‑ви́‑ло.

Конструкция сложнее, чем правило.

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