To grasp "the Present Perfect" and the Irregular verbs' past tense &past participle tense.

中文意思：掌握现在完成时态以及不规则动词的过去时态和过去分词…

youdao

To grasp "the Present Perfect" and the Irregular verbs' past tense &past participle tense.

中文意思：掌握现在完成时态以及不规则动词的过去时态和过去分词…

youdao