Will be doing表达应该怎样理解?

句子里的to be doing应该怎样理解? 让某物被做某事用英文应该怎样表达?是have sth to be done么?还是have sth doing? will do和will be doing在表达意思上是一样的吗?是否可以互换使用?另外will be doing是一种 would 和 will be doing will be doing 是什么句式, Will be doing是什么时态 be to do与will be doing will be doing和will doing的区别 be doing/to do,will be doing区别 will be doing 与 would be doing 的区别 what will you be doing tomorrow要用怎样的时态去回答 will be doing 和will be done的区别