We can use the present perfect and the present perfect continuous to talk about actions, unfinished actions that started in the past, and are still true now.

我们可以用成时和成进行时谈论动作，从过去开始成但然进行动作。

Now 'gone' is the one to use when it's an unfinished action that started in the past and affects the present moment.

而谈论开始于过去、成并影响动作时，用“gone”。

So these are three common phrases that you can use with the present perfect when you are talking about unfinished time, again, from the past until now.

所以这些是三个常用短语，你可以用它们谈论从过去到为止成时间时使用成时。

The present perfect is used here because the action, visiting Paris, happened at some point in the past, and it is still relevant to the present.

此处使用成时，是因为“参观巴黎” 这一行为发生过去某个时刻，且至今与相关。 虽然具体参观时间明确指出， 但重点于截至目前为止体验。

Now, this is especially important when we are talking about unfinished time, from a time in the past until now.

，当我们谈论从过去某个时间直到成时间时，这一点尤其重要。