need sb do sth:需要某人做某事 | 需要或者人做没事
需要某人做某事 Need sb. To do sth.
wand sb. to do sth.想要某人做某事 would like sb. to do sth. 要某人做某事 need sb. to do sth徐要某人做某事 ask sb. to sth要（请）某人做某事 let sb. do sth.让某人做某事 require sb. to do sth。.
need sb to do sth.例子：i need you to finish your homework. （我让你完成你的作业）
ask sb to do sth 可以表示要求某人做某事的意思