Question

She have bought the computer since three years ago 对吗

Answer 1

1. 时态不对。
改成：She bought the computer three years ago.（没有since，说的是过去的事）
2. buy是个终止性动词，不能与since three years ago（自从三年前以来）一段时间状语连用，应把have bought改成have had
改成：She has had the computer since three years ago.
3.主谓不一致
She have是不对的

Answer 2

不对，这句话如果是强调三年前发生的动作，应该这么说：
She bought the computer three years ago.

如果要强调三年之久，则应如下说：

She have bought the computer for three years.

追问

哦

追答

要，没注意呢，呵呵
She has bought the computer for three years

Answer 3

你好，这是一个错误的句子，简单讲一下
since three years ago 表示从三年前到现在，是一个持续的时间，一个过程
但是buy买是一个短暂性的动词，你想，“买”在买的那一瞬间动作就完成了
怎么能说从三年前到现在一直在买呢？
因此，需要把buy改成一个延续的动词，你买了它，等于你拥有了它
那么就是have，因为是现在完成时前面的have还要改成has
She has had the computer since three years ago

祝你学习进步

Answer 4

错。
应该是 she has had the computer for three years
或者 she bought the computer three years ago