关于“O”水准的标准的解释是新加坡剑桥O水准考试（Singapore-Cambridge General Certificate of Education Ordinary Level Examinations，简称GCE‘O’ Level）是由新加坡教育部和英国剑桥大学考试局共同主办的统一考试，也是新加坡的中学生在4年中学教育结束后参加的考试。
O-Level考试一年举办一次，考试成绩为英联邦各个国家所承认和接受。考生可以用O水准的成绩为标准申请进入新加坡初级学院、理工学院。
不仅如此，新加坡O水准的成绩受海外院校的高度认可，可以直接申请海外知名学院或是大学的预科课程，例如澳洲的八大，英国、美国、加拿大等国的知名大学
when，while，as考点辨析
when,while,as都能引导多种状语从句：
一、when常见考点
1、"当……时候",引导时间状语从句。
When he was a young man，he was fond of hunting. It was already 10：00PM，when I finished the work.
2、"正在那时，这时"等于and at that time，引导时间状语从句。
We were having a meeting when someone broke in. We were about to leave when it began to rain.
3、"既然"等于since或considering that， 引导原因状语从句。
It was foolish of you to take a taxi，when you should easily walk there in five minutes. How can they learn anything when they spend all their spare time watching TV？
4、"虽然，然而，可是"引导让步状语从句。
He usually walks when he might ride. They had only three chairs when they need five.
二、while常见考点
1、"当……时候"， 引导时间状语从句（从句动作必须是延续性的）。
Please don't talk so loud while others are working. While I was cleaning the window，my finger was seriously cut.
2、"虽然，尽管"相当于although，引导让步状语从句（常把while放在句首）。
While she is a top student，she has some shortcomings. While the Internet is bridging the distance between people，it may also be breaking some home or will cause other family problems.
3、"只要，如果"等于as long as，引导条件状语从句。
There is hope while there is life. While you study hard，your effort will pay off.
4、"而，然而"，表对比或相反的情况。
He likes pop music，while I am fond of folk music. Kids talk frequently about what they can do，while many adults do the opposite，tending to talk about what they can't .
三、as常见考点
1、"一边……一边"或"随着……"，引导时间状语从句（as引导的从句内部的动作与主句内动作同步）。
John sings as he works.（一边……一边）
Jame's blindness was getting worse as he was getting older.（随着……）
2、"因为"， 引导原因状语从句。
As you weren't there，I left a message. Perhapshe will need some help as he was ill.
3、"尽管，即使，虽然"引导让步状语从句（用于形容词，副词或名词后构成部分倒装）。
Young as I am，I already know what career I want to follow. Much as I like you，I couldn't live with you. Child as Tom is，he has been a success.
以上就是小编为大家整理的关于新加坡O-Level考试核心词汇辨析，希望对大家有所帮助。更多o水准考试时间、olevel培训机构等问题可以咨询我们。
说到英语的学习，大家都知道单词的积累和语法的掌握是学习英语最重要也是最难的地方。很多同学在积累单词的时候效率总是跟不上，要想积累更多的英语单词，那就要掌握方法，方法用对，学习才能提高效率。下面课窝考试网小编给大家分享几个学习英语单词的方法，备考O-Level考试的你可以作为参考。
O-LEVEL在线试听课程
