韩国央行：若有必要，将在外汇市场采取行动

Use “若” (or “如果”) to introduce a hypothetical and follow with “就/将” to show what will happen when the condition is met.

Use “以” plus a verb phrase to indicate purpose, similar to “in order to…”

Use “后” or “以后” after a verb to show the next action happens after the first.

Use “的关键在于” to highlight the core factor of something, equivalent to “the key to A is B.”

Use “可能” before a verb (often with “会”) to express that something might happen.