现在完成时和过去完成时都是完成时的例子。

The present perfect and the past perfect are both examples of ___the ___perfect ___tense.

在英语中，完成时是用 'have' 和过去分词构成的。

In English, ___the ___perfect is formed using 'have' and a past participle.

完成时用于描述过去完成的动作。

___The ___perfect ___tense is used to describe actions completed in the past.