sth共20篇 have sth done和have sth doing区别havesthdone叫某人这件事,(某件事被做)；havesthdoing.使某物持续... keep on doing sth和keep doing sth的区别keepdoingsomething意思为：保持做某事，keepondoingsomething意... get sth done和have sth done的区别getsthdone一般是指自己完成的，比如Igetmyhomeworkfinished.意思... demand sb to do sth有这个用法吗没有。我们说的demandsbdosth，demand后接名词或代词时，其主语可... i want to do sth是什么结构Iwanttodosomething这个句子,todosomething是动词不定式短语作谓... 上一页 下一页
