请问Let us not do还是let us don't do?

请问Let us not do还是let us don't do? 英语let us not do 还是let us do not do 给理由 let us do not waste time 和 let us not waste time 的区别 Let us sb do用法 Let us do something exciting. 英语t填空Let us ____ tell anyone about it.not 还是 don not Let's=Let us + do 造句! Let us talk about the future world,________?A don,t we B do letlet sb do sth句型,怎么变否定句?let sb not do sth还是let sb don‘t do 翻译全句Do not let us down. 1.I do not know the way to Sandy's home.Let us go there t Let us 用do还是doing还是dos