present perfect的意思

n.現在完成時

present perfects───現在完成時

past perfect───（動詞的）過去完成時

preterperfect───預完善

past perfects───（動詞的）過去完成時

present tense───現在式時態

present tenses───現在式時態

present trend───當前趨勢

present evidence───提供證據

present research───當前的研究

There is no exactly equivalent French tense to the present perfect tense in English.───法語里沒有和英語中的現在完成時完全對應的時態.

Rewrite the following sentences using the Present Perfect Passive Voice.───用現在完成時的被動語態改寫下列句子.

Past simple or present perfect?───一般過去時還是現在完成時?

Explaining some topic already obtained uses present perfect tense.───說明某個課題現在已經取得的成果,適宜采用現在完成時.

Sum up the new vocabulary in this Unit, and Present Perfect Tense.───明確本單元所學的詞匯和語法,增強他們正確操作的能力.

The present perfect tense emphasizes the effect of the past action on the present.───現在完成式強調過去所發生的事情對現在的影響.

Explain and illustrate the main use of the present perfect tense.───解釋并舉例說明現在完成時態的用法.

The tense is present perfect progressive.───進行時)(現在,過去,將來,現在完成-進行時 )

To grasp the usage of the present perfect tense.───掌握現在完成時態的用法.