请问buy与bought,区别用法?Ibought him abook.我买了一本书给他.为什么不用buy?而用bought?

请问buy与bought,区别用法?Ibought him abook.我买了一本书给他.为什么不用buy?而用bought? buy 与purchase 的用法有区别么 buy with 和buy for 的区别He bought it for very little money.( 此处不能用with)请问,此处为什么不能用with buy与buy up的区别 buy shop 用法这两者用法有什么区别吗? 请问,close 与 closely,英语用法有什么区别? 请问so与such的区别及用法 请问“have”与“have got”的区别用法? 请问dress与wear在用法上有什么区别? 请问variance 与 variation 的区别,在用法上? 请问''take up与''occupy''有什么区别,用法是什么? 请问有谁知道offer与afford用法的区别 请问Version与Edition的区别和用法.如题. buy的用法buy sth.to sb.和 buy sth.for sb.的区别是什么? 请问三极管Ic=βIb+Iceo与Ic=βIb是在什么不同条件下 关于worth用法的英语问题though the radio seems a bit too expensive,it is well .选项：worth to buy ,worth buying ,worthy of buying ,worth being bought应该用被动吧?请问有worth being bought的用法吗? depend on与depend的区别及用法.请问depend on与depend的区别及用法。 when did he buy the car 和when he bought the car 怎么区别在哪