Question

창문을 닫자 방 안은 조용해졌어요 The -마자 part of -자마자 is optional; it is often used in spoken language to emphasize the sense of immediacy. The short version -자 corresponds to the plain 'when' or 'upon'. Additionally, -마자 cannot be dropped if the second clause is an imperative or propositive expression.

Accepted Answer

The room became quiet when I closed the window

Front	창문을 닫자 방 안은 조용해졌어요
Back	The room became quiet when I closed the window
Notes	The -마자 part of -자마자 is optional; it is often used in spoken language to emphasize the sense of immediacy. The short version -자 corresponds to the plain 'when' or 'upon'. Additionally, -마자 cannot be dropped if the second clause is an imperative or propositive expression.

마자 창문을 닫자 방 안은 조용해졌어요 Room Quiet