sure /ʃuə/ I. adj. 1.肯定，有把握 (只用作表语) （跟从句和介词of或about短语）：I am sure smoking hurts you.我确信吸烟对你有害。I’m not sure where he lives. 我不知道他住在哪儿。 You may be sure of his honesty.你要确信他的诚实。Do you feel sure about it?你能对这有把握吗? 2.一定会，准会(只跟不定式)： She’s sure to find out the truth tonight. 她今晚一定会把真相搞清楚。It is sure to rain.一定会下雨的。 3.有把握的,肯定的(只用作定语) Dark clouds are a sure sign of rain.乌云密布肯定是下雨的征兆。sure enough 果真：When X-rays were taken, sure enough, there was the needle. 拍完X光片后，果真有一根针。for sure 肯定地：I don’t know for sure that he was dead.我确实不知道他去世了。make sure 肯定；务必：He looked behind to make sure he was not being followed. 他往后看了看确保没有人跟踪。He arrived at the cinema early to make sure of a seat. 为保证搞到座位他一大早就到了电影院。Make sure to turn off the radio before you going out. 出去前一定要把收音机关上。 ‖II. adv. 肯定地，当然(主要用于口语)： Sure, I will help you. 我当然愿意帮你。 — Would you like to come? — Sure!“你愿意来吗?” “当然愿意!”
surely adv.1.一定，确实： She will surely win. 他一定会赢。 2.当然，不成问题：Surely this bad weather won’t last much longer. 这种坏天气当然不会持续太久。
