时态一般现在时一般过去时一般将来时现在进行时现在完成时态⑴由have/ has + 过去分词⑵表示过去发生或已经完成的某一动作对现在造成的影响或结果常与already, just , yet , ever, never 连用Have you finished your work yet?你完成了你的工作了吗?Yes, I have. I have just finished it. I have already finished it我已经完成了。Have you ever been to China? 你曾经去过中国吗?No, I have never been there. ⑶ ①表示过去已经开始,持续到现在的动作或状态和表示过去某一时刻延续到现在(包括现在在内)的一段时间的状..