need sb to do sth 需要某人做某事
要说的是 没有need sb do sth
例子:i need you to finish your homework. (我让你完成你的作业)
need 可以做情态动词, 但用法不是 need sb do sth, 用法同其他情态动词 即need do sth,
同时need 也可以做普通动词,就有了 need sb to do sth. 这种用法
sb need to do sth
sth need doing sth
need to do (需要做……)表示主动语态,主语为人.
need doing(需要被做)表示被动语态[相当于need to be done],主语为物.
call for sb to do sth 要求某人做某事