let sb.do让某人做...
let out...放出...泄漏...
let sb down让某人失望
let ...alone别管...
let alone...更不用说
often usually都是时间副词,可以用来修饰很多东西呢,一般是加一般现在时的
let sb.do让某人做...
let out...放出...泄漏...
let sb down让某人失望
let ...alone别管...
let alone...更不用说
often usually都是时间副词,可以用来修饰很多东西呢,一般是加一般现在时的