need sb.to do sth.可不可以换成need sb.doing sth.

可不可以说welcome sb to do sth 英语语法中,need sb sth是need sb to do 还是need sb do /doing sth? need sb to do sth 用法 help sb.do sth.可不可以说成 help sb.to do sth.please help me! need sb to do sth的sb要是宾格吗? play games with sb,need to do sth ,call sb need sb do sth还是need sb to do sth?有什么区别 need sb.to do sth.可不可以换成need sb.doing sth. need sb to do sthsb 指什么sth 指什么 某人代替某人做某事有几种说法我可不可以说sb.replace sb.to do sth.sb.substitue sb.to do sth.sb.take the place of sb.to do sth.sb.take one's place to do sth.sb.do sth.in place of sb.sb.do sth.instead of sb. need sth to do do sb.to do sth. 英语固定词组1,need sb 是do sth 还是 to do sth2,help sb 是do sth 还是 to do sth sb.happen to do sth. invite sb to do sth teach sb.to do sth. keep sb to do sth told sb.to do sth.