解説
‘不料’表示事情的发展出乎意料，通常引出与预期相反的结果；‘可’表示转折，相当于‘但是’，强调前后句意的对比；‘若’表示假设条件，相当于‘如果’，多用于书面或正式语境。
'不料' indicates an unexpected outcome contrary to expectation; '可' expresses contrast or concession, similar to 'but'; '若' introduces a conditional assumption, equivalent to 'if', often used in formal contexts.
例文
我今天本想去操场踢足球，不料外面下起雨来。
I originally planned to go to the playground to play soccer today, but unexpectedly it started raining outside.
我们约定一起去长城玩儿，可他忘记了。
We agreed to visit the Great Wall together, but he forgot.
若这个时间你不方便，我们就换一个。
If this time is inconvenient for you, we can choose another one.
関連文法
连接词或词组：而、同、与HSK 6六20
词类 · 连词
这三个词都是连词，用于连接并列的成分。'而'常用于连接形容词，表示并列或递进关系；'同'和'与'则用于连接名词或代词，表示'和'的意思，其中'与'多用于书面语。
These three words are conjunctions used to connect parallel components. '而' is often used to connect adjectives, indicating a parallel or progressive relationship; '同' and '与' are used to connect nouns or pronouns, meaning 'and', with '与' being more formal and typically used in written language.
例文 (3)
她善良而乐观。
She is kind and optimistic.
我同他都是新员工。
He and I are both new employees.
成与不成，都看你的啦！
Whether it succeeds or not, it's all up to you!