未來簡單式：will vs be going to
核心差異
| 用法 | will | be going to |
|---|---|---|
| 瞬間決定 | ✅ I'll help you! | ❌ |
| 預先計畫 | ❌ | ✅ I'm going to study medicine. |
| 單純預測 (主觀) | ✅ It will be sunny. | ✅ It's going to rain. (有跡象) |
| 承諾/提議/威脅 | ✅ I'll call you. | ❌ |
構造
will + 原形動詞
否定：will not (won't)
疑問：Will + 主詞 + 原形動詞？
am/is/are + going to + 原形動詞
否定：am/is/are + not + going to
疑問：Am/Is/Are + 主詞 + going to？
關鍵字
會考常見陷阱
🪤 陷阱 1：時間副詞子句用現在式表未來
When he arrives, I will call you. (非 arrives → will arrive)
If it rains tomorrow, I won't go. (非 will rain)
🪤 陷阱 2：be going to 表示「有跡象」的預測
Look at those clouds! It is going to rain. (看到雲 = 有跡象)