5kw科勒发电机组:help sb. do sth.和 help sb.doing sth.的区别是什么

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? help sb. do sth.和 help sb.doing sth.的区别是什么 help sb. to sth.和help sb. sth.一样吗？ help sb do sth 的同义词组是什么 aught sb do sth.. take sb do sth hear sb do sth 和 hear sb do sth 有什么区别？ make sb do sth 和 let sb do sth的区别?