问一个英语语法的问题1:my sister and I have dreamed about taking a grea
问一个英语语法的问题
1:my sister and I have dreamed about taking a great bike trip.为什么dream是过去式而不是have?还有take为什么是进行时?2:two years ago she bought a pen and then she persuaded me to buy one.前面buy是过去式,为什么后面的不用?还有为什么要加一个then?可以省略吗?