—Why have they sent me this bill?
—I ( )it several weeks ago. 答案给的是paid,为什么不能用have paid。是因为有一个ago,所以就只能用paid吗?
—Why have they sent me this bill?
—I ( )it several weeks ago. 答案给的是paid,为什么不能用have paid。是因为有一个ago,所以就只能用paid吗?
看到ago就要用一般过去时,如果把several weeks ago换成yesterday,肯定毫无疑问用paid
这样说你能更容易理解么?从时状可以判断出时态。。