Athletics田径 I have signed him up for it.我替他报名了。 A: He'll run the one-hundred-meter dash.他将参加100米短跑。 B: I have signed him up for it.我替他报名了。 sign up意思与sign on非常接近,表示签名同意从事某份工作或上某一门课程。如:Sign up more workers to boost production.签约更多的雇用工人以促进生产。 The women's triple jump is in the bag. 女子三级跳冠军八成是我们的了。 A: The women's triple jump is in the bag.女子三级跳冠军八成是我们的了。 B: We need it.那是一定要赢的。 当你说(sth.)be in the bag时,表示你对这件事很有把握。