记忆方法
双解例句
小知识
When you're certain, you're sure about something. When you raise your hand to give the answer, you feel certain that you are correct.
Certain can mean “definite” or “sure to happen,” like getting wet, a certain outcome of not having an umbrella in a rainstorm. It can also refer to a particular person or thing. You can use it avoid explaining something unnecessarily — you might say, “There are certain things I want to do when I get home.” To avoid saying someone's name, you can say, “a certain person,” as in, “A certain person left the kitchen a mess.”
实用短语
常用短语
单词用法
a certain degree到某种程度
for certain肯定地;确凿地
certain level某一水平
sure:侧重主观上对某事确信无疑。
certain与sure同义,但语气比sure强,着重指有确切理由或不容置疑的证据所支持的确信。
definite:指已毫无怀疑的余地。
positive:语气强烈,指对自己的看法或作的结论的正确性有不可动摇的信念。
词根词缀
词根: cert
=sure/separate,表示”搞清,区别”
adj.
certain 肯定的cert搞清,区别+ain表示形容词→搞清楚的→肯定的
n.
certainty 必然,肯定;必然的事certain[adj.肯定的]+ty表名词→n.必然,肯定;必然的事
certificate 证明书;执照certify[v.证明;保证]+icate→证明的东西
certitude 确信;确实cert搞清,区别+itude状态→确定状态
concert 音乐会, 一致con共同+cert搞清,区别→一致,和谐→音乐会
v.
ascertain 确定,发现as一再+certain[adj.肯定的]→一再搞清
certify 证明;保证cert搞清,区别+ify表动词→搞清楚→证明
同义词辨析
同义词
particular / special / some
decided / some / decisive / conclusive / destined / particular / confirmed / special / unquestionable / insistent / positive / factual / definite / especial / real / confident / unavoidable / inevitable / fated / true / demonstrable / sure