be to do something和be doing something有何区别

be to do something和be doing something有何区别 be used to do something 和be used for doing something有没有区别 it+be+adj+to do something和it+be+adj+doing something的区别 请问 will do something 和will be doing something 有什么区别,有例句最好 usd to do something与be usd to doing something区别 be set to do something和be bound to do something的区别 like doing something 和like to do something 的区别 forget to do something和forget doing something区别用法 allow to do something 和allow doing something 有什么区别 be duo to something与be due to doing something的区别 be +形容词+to do something还是doing sth be up to do something