let "s sb to do sth谁能给我讲一讲什么时候用,也就是句型的用法.thank you very much!

let "s sb to do sth谁能给我讲一讲什么时候用,也就是句型的用法.thank you very much! let sb to do sth和let's sb do sth的复数形式 let's sb to do sth还是doing sth let sb to do 还是let sb do let sb do sth还是let sb to do sth let sb.do sth.or let sb.to do sth let sb to do 中文意思 let sb to do sth怎么造句 let sb to do sth 对吗?为什么 let sb to do sth=? lt's easy for sb.let sb.do sth. 英语短语中人称变化Let sb do sthHelp sb to do sthIt's one's turn to do sthSb do one's homeworkIt's time for sb to do sth等这些短语中的动词随不随人称变化 翻译英语句子（固定用法）make sb. do sth. ask sb. to do sth. let sb.do sth. be going to do sth. help sb do sth. Ih's time to do sth. 关于let句型是let sb do sth还是let sb to do sth 初一上册英语句型总结百度知道如：let‘s sb.to do sth. let sb.do sth.let to do sth.let do sth.的用法 let sb do sth 和 let sb to do sth的区别是—— let sb to do sth 和 let sb do sth 都可以吗