定义 / 说明
just, already, yet, still 常与 Present Perfect 搭配，用于描述与现在相关的时间状态。它们分别表达“刚刚发生”“比预期更早”“到现在还没/已经”“状态仍未改变”。这些词虽小，但会明显改变句子含义和语气。它们在句中的常见位置也很关键，所以本点既要学意义，也要学语序。
关键规则
- just 表示刚刚：I have just finished.
- already 表示比预期早：She has already left.
- yet 常用于疑问和否定，通常放句末：Have you done it yet?
- still 常用于表示“到现在仍未变化”：I still haven't heard from him.
- just 和 already 通常放在过去分词前。
例句
- I have just finished the report. - 我刚完成报告。
- She has already left the office. - 她已经离开办公室了。
- Have you done it yet? - 你做完了吗？
- We still haven't received an answer. - 我们到现在还没收到答复。
- They have already booked the tickets. - 他们已经订好票了。
常见错误
- ❌ I have finished just. -> ✅ I have just finished.
- ❌ Have you yet done it? -> ✅ Have you done it yet?
- ❌ She still has not yet called me. -> ✅ She still hasn't called me.