GbEng
我(那时)很着急。--你用不着着急嘛。 I was worried. You needn't have been.
你用不着让自己这么不安的。 There's no need to upset yourself.
暂时还用不着,谢谢你。 Not at the moment, thank you.
其实用不着在清晨3点钟就把我叫醒吧. I could have done without being (ie I wish I hadn't been) woken up at 3 o'clock in the morning.