eojeneun iri manhaseo jeongmal bappasseoyo.

subject particle

Breakdown of eojeneun iri manhaseo jeongmal bappasseoyo.

• ~는: topic particle
• 어제: yesterday
• 많다: many

Questions & Answers about eojeneun iri manhaseo jeongmal bappasseoyo.

What does 는 do in 어제는?

-는 is the topic marker. By saying 어제는, you’re essentially saying “as for yesterday…” or “yesterday (speaking of)….” It sets 어제 (yesterday) as the frame of reference for the whole sentence. If you used 어제가, it would simply mark 어제 as the subject (“yesterday did X”), but using -는 makes it clear you’re talking about that day’s context.

Why is it 일이 많아서 and not 일을 많아서?

The adjective 많다 (“to be many/much”) takes a subject (이/가), not an object (을/를). Grammatically, 일 is the subject of 많다: “there was a lot of work.” That’s why you use 일이 많아서—일 + 이. If it were a transitive verb like 하다, you’d see 을/를 (e.g., 일을 했다).

How does 많아서 work? Why not 많았어서?

많아서 is the connective (causal) form of 많다. You take the adjective stem 많- and add -아서/어서 to mean “because….” This form does not carry tense—tense is shown only in the final verb. So even though the reason (“there was a lot of work”) happened in the past, you still use 많아서, not 많았어서. The past tense appears on 바빴어요.