现在完成时
The Present Perfect Tense
能够将动词的现在完成时形式与一般过去时进行对比，理解现在完成时所表示的动作发生在不确定的时间，或与现在仍有联系（例如：'He has gone out' 与 'He went out' 的区别）。
Use the present perfect form of verbs in contrast to the simple past tense, understanding how the present perfect indicates an action completed at an unspecified time or with ongoing relevance (e.g., 'He has gone out' vs 'He went out')
学习证据 / Evidence
- 用 has/have + 过去分词构成现在完成时（例如：'She has eaten'、'They have finished'）。
- 根据想要表达的意思，在一般过去时和现在完成时之间做出选择（例如：'I ate lunch' 和 'I have eaten lunch'）。
- 识别文本中的现在完成时形式，并解释作者为什么使用它而不是一般过去时。
- Form the present perfect using 'has/have' + past participle (e.g., 'She has eaten', 'They have finished')
- Choose between simple past and present perfect to match the intended meaning (e.g., 'I ate lunch' vs 'I have eaten lunch')
- Identify the present perfect form in a text and explain why the author used it instead of simple past
评估问题 / Assessment
{{name}}能否解释“I ate breakfast”（一般过去时）和“I have eaten breakfast”（现在完成时）之间的区别——知道前者表示一个已完成的动作，而后者将过去与现在联系起来？
Can {{name}} explain the difference between "I ate breakfast" (simple past) and "I have eaten breakfast" (present perfect) — knowing one means a finished action and the other links the past to right now?