| 1. | The verb must be in the present perfect tense 动词必须用现在完成时态。 |
| 2. | " recently " has the widest use , in positive and negative statements and questions , with the past tense and the present perfect tense “recently”用法最广,可用于肯定式陈述句、否定式陈述句及疑问句中,与过去时态和现在完成时态连用。 |
| 3. | To grasp the usage of the present perfect tense 掌握现在完成时态的用法 |
| 4. | Past future perfect tense 过去将来完成时 |
| 5. | Let me try to help you understand . perfect tense shows relative time between events 完成时表示的是事情之间的时间关系: |
| 6. | Past perfect tense is used to say that one past event happened before another 过去完成时指的是事情发生在过去的时间之前。 |
| 7. | The perfect tense 完成式完成时态 |
| 8. | Present perfect tense 过去完成时 |
| 9. | Future perfect tense 将来完成时 |
| 10. | Past perfect tense 现在完成时 |