导读: 为了让大家对职称英语考试常用词汇有一定的了解,充分备考2015年职称英语考试,英语网整理了2015年职称英语考试《理工类》高频词汇短语复习汇总,以供大家参考!更多关于2015年职称英语考试的相关学习资料和考试资讯尽在英语网!
wheter,if 这两个连接词都表示 是否、是不是 之意。
whether: 是否、无论、不管是否 它可以表示两种不同的条件或情况,意为不论还是,可以引导间接引语. 也可表示疑惑,意思都是 是否。在下列情况下,不能用if代替:引导不定式:(1) 引导不定式:(2) 作介词宾语:(3) 在名词之后引导同位语:(4) 引导主语从句并置于句首:(5) 与or not连用。常用短语:whetheror 不论还是;whether or not是否;whether by accident or design 不知是无意还是有意。
This is certainly the case, but whether it is a defect or not I dont quite know. 这肯定是事实,但它是否是一个缺点,我真的不知道。
if: 是否 一般用在口语中,通常只能引导宾语从句,可以和whether 交换使用。常用在wonder 等动词之后。
I wonder if his action will be in agreement with his word thistime. 我不知道他这次是否能言行一致。
till ,until都直到 之意。
till:多用于口语。在肯定句中,与表示持续动作的动词连用,表示某个动作或状态延续 到为止: 在否定句中,一般不能置于句首。
He didnt join the army till th civil war broke out. 直到战争爆发,他才参了军。
until:比till更为正式,可以置于句首,更适用于引导较长的从句或强调句中。常用短语:not until 直到才。
He did not go to bed until he had made sure that nothing was wrong wilh the pipes. 直到他确信水管没毛病了才去睡觉。
Students going abroad struggle with new culture
It's not doping that wins races, Sun says - it's lots of hard work
China helps bust US drug websites
Seventeen partygoers 'found beheaded' in Afghanistan
Burn the bridge?
Games begin not with a bang, but a Tweet
Chinese frigate safely refloated
Mars rover to find out if we're alone
What do you think of this weather?
Yeah! She Won
如何形容型男的身材?
Game face?
Clinton on landmark visit to Laos
Rooftop rice a sky-high solution
Street performers will soon gain legal status in Shanghai
Gold-trading ring took in billions
乱弹小布什“笼子演讲”翻译问题
Air China flight returns to Beijing over false threat
Clinton to discuss wide range of issues during China visit
Feuding couples lead rise in online slander
爱尔兰咖啡,天使的眼泪
Golden moments may be fewer in London
Curiosity of a girl lands on Mars
Drivers at fault in tragic accident
Qihoo 360 challenges Baidu's hold on search engines
Clinton visit raises concerns
Pirates have letterhead to go with sizable demands
Adidas to open 600 more stores
Rescued fishing vessel heads to Tanzania
Hostages finally come home