be helpful 的用法Chess players find that playing against a computer is helpful to improve their skills.这句话中 to improve 错在何处?是不是应改为to improving?谢Chess players find that playing against a computer is helpful to improve

be helpful 的用法Chess players find that playing against a computer is helpful to improve their skills.这句话中 to improve 错在何处?是不是应改为to improving?谢Chess players find that playing against a computer is helpful to improve Be the chess player,not the chess 虚拟的用法it would be helpful if government improve/improved the traffic jam.请问improve在这里必须用过去式吗?还是原型也可以? 一个简单的英语翻译短语 try to be more helpful, they和they are的区别及用法,是什么?他们的区别是什么啊.they后面什么时候跟be动词 ,,,,,,,,,,,,,,,什么时候不用be动词，举个例子、谢谢 ...那看看我这句话有不有语病：They like play chess. 作文Be helpful to others Be helpful to others急! be helpful in be helpful to be helpful for 三者区别即怎么用 He ,is like her father,likes playing chess.这句话中like的用法对吗, sat的一道题Chess players find that playing against a computer is helpful to improve their skills,even though no chess-playing computer has yet won a championship.选错的A:to improveB:theirC:even thoughD:wonE:No error我总感觉是Ebe helpful t be born的用法 be动词的用法 动词be的用法 be sure的用法 be from的用法? be动词的用法 be over的用法 must be的用法