present perfect noun
Learner's definition of PRESENT PERFECT
the present perfect
grammar
: a verb tense that is used to refer to an action that began in the past and is completed at the time of speaking（动词的）现在完成时 ◊ The present perfect in English is formed with “has” and “have” and the past participle of a verb, as in “He has left” and “They have found what they were looking for.”英语中现在完成时由has或have加动词的过去分词构成，例如He has left和They have found what they were looking for两句。