the tense of a verb that shows action that has happened in the past or before another time or event

In English, the perfect is formed with "have" and the past participle of the verb. 在英语中，完成时是由 have 加动词的过去分词构成的。

The perfect tense has a lot of irregular endings.

They are not yet comfortable with aspects of the language such as the perfect tense.

We use auxiliary verbs to form the perfect tenses.

The use of the perfect tense gives the text a vivid feel.

See also: perfect noun