bought和buy是什么关系
bought和buy是什么关系
buy/bought/bought/
who bought it?和who did buy it?
buy怎么变成bought
has bought 和 was bought的区别是什么?
为什么用buy而不是bought
buy的过去式是不是bought?
I bought a used car和I buy a used car 区别在哪
where have you bought it和where did you buy it有什么区别
have sth to buy 和have sth to be bought有什么区别
Have you bought a new bag 和Did you buy a new bag有什么区别
请问buy与bought,区别用法?