present continuous tense 跟present perfect continuous tense的混乱两个都是指"已完成一些东西..但还要继续做"那该用哪一个?我好乱

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present continuous tense 跟present perfect continuous tense的混乱两个都是指

present continuous tense 跟present perfect continuous tense的混乱两个都是指"已完成一些东西..但还要继续做"那该用哪一个?我好乱
present continuous tense 跟present perfect continuous tense的混乱
两个都是指"已完成一些东西..但还要继续做"
那该用哪一个?我好乱

present continuous tense 跟present perfect continuous tense的混乱两个都是指"已完成一些东西..但还要继续做"那该用哪一个?我好乱
现在进行时态.和现在完成进行时态.
要具体情况具体分析.
1)I am studying English(强调现在或现在阶段的动作)
2) I have been studying English since last year.(强调从过去到现在,也许一直做下去的动作)