be up to sb to do be up to“由……决定；胜任”。 例如：It's up to you to decide.

It is up to sb. to do sth. 该句型为“该由某人做。。。”。该句型中up后的to是介词。 It is up to him to clean our classroom today. 今天应由他做教室清洁。 It is up to parents to teach their children manners. 该由父母教孩子礼貌。

（1）没有be up to do这种说法。 （2）be up to doing sth. （体力或智力上）能胜任：I'm not up to going to work today.今天我不能去上班。（可能是身体不舒服。） （3）be up to sth. （体力或智力上）能胜任：He is not up to the job.他无...

太经典了 Cuz when you wake up 当你醒来时, I wont be there 我已不会在那里了. 哈哈哈哈 好帖

be up to sb’s neck 深陷...；忙于...；到...极点 例： 1. Even as a young man he (was up to his neck) in crime. 他年轻时即已恶贯满盈. 2. He (was up to his neck) in debts then. 他当时负债累累。 3. It seems he (is up to his neck) in...

what be sb going to be when sb grow up? 当某人长大后，会是什么？ 《百度翻译》供你参考。