She went to the beach three days____ 1.last 2.beShe went to the beach three days____ 1.last 2.before 3.ago 请问before 和ago 的区别

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She went to the beach three days____ 1.last 2.beShe went to the beach three days____ 1.last 2.before 3.ago 请问before 和ago 的区别
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She went to the beach three days____ 1.last 2.beShe went to the beach three days____ 1.last 2.before 3.ago 请问before 和ago 的区别
She went to the beach three days____ 1.last 2.be
She went to the beach three days____ 1.last 2.before 3.ago 请问before 和ago 的区别

She went to the beach three days____ 1.last 2.beShe went to the beach three days____ 1.last 2.before 3.ago 请问before 和ago 的区别
She went to the beach three days ago.
在句子末尾时,before多用于完成时态,ago多用于一般过去时(注意,如果是since.ago的,还是用完成时态)

ago 表示是现在完成时 before 不是 这是一