assist sb.to do sth.和assist sb.in doing sth.

assist sb.to do sth.和assist sb.in doing sth. assist sb in doing sth中in可否省略? assist sb to do sth中to可以去掉么? help sb in doing sth &help sb to do sth help sb doing sth和help sb to do sth Hear sb to do sth 和 hear sb doing sth ask sb to do sth和ask sb doing sth make sb.to do sth,make sb doing sth和 make sb.do sth区别 ask sb to do sth 和 ask sb in doing sth 有啥区别? help sb do sth help sb doing sth help sb to do sth help sb w tell sb doing sth还是tell sb to do sth take sb.doing sth.还是take sb.to do sth.