Present Perfect Simple. The present perfect simple expresses an action that is still going on or that stopped recently, but has an influence on …
英语语法中的现在完成时（Present Perfect Simple）是一个重要的时态，用于表示动作或状态在过去开始并持续到现在，或者与现在有关。 它 …
Level: beginner. The present perfect is formed from the present tense of the verb have and the past participle of a verb. We use the present …
We use both the present perfect simple (have or has + past participle) and the present perfect continuous (have or has + been + -ing form) …
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