新手做房产中介:want sb. to do sth.和want sb. doing sth.有什么区别

want sb. to do sth.和want sb. doing sth.有什么区别 want to sb to do help sb to do sth和help sb do sth请问什么意思 help sb. do sth还是help sb to do sth? help sb. do sth还是help sb to do sth? get sb do sth还是get sb to do sth let sb. do sth.or let sb.to do sth take sb doing sth 和 take sb to do sth怎么区别的？ 是offer sb sth还是 offer sb to do sth? allow sb. to do sth.吗？