英语复习知识点概要be of…结构小结 be certain…; be sure be uncertain about意思是“对……不确定(没把握)” uncertain的词根是certain,意思是“确信的,有把握的”,常用于以下结构: (1)be certain(sure) to do sth.“肯定会做……”(表示某事将要发生)。如: He is certain(sure) to come next Sunday. (2)be certain(sure) of/ about sth.“确信、有把握”(表示某个人的思想状态)。如: We are certain/ sure of victory. (3)名词从句作主语时,一般多用certain. It is certain that he will come. 语法易错题 速记英语单词的方法 高中英语教材 be of…结构小结 (1)be of + 表示年龄(age)、大小(size)、颜色(color)、重量(weight)、高度(height)、价格(price)、意见(opinion)、形状(shape)、种类(kind)和方法(way)等名词,说明主语的特征,of表示“具有”之意,有时可省去。例如: They are both of middle height.他俩都是中等个儿。 When I was of your age, I was a teacher.当我是你这个年龄时,我当老师了。 These flowers are of different colors.这些花朵颜色不同。 Tom is of a different way of thinking.汤姆的思维方式与别人不同。 注意:此结构中,如果of后面的名词前有不定冠词a/an,则a/an=the same.例如: The two boys are of an/the same age.这两个男孩同龄。 These bottles are of a/the same size.这些瓶子大小一样。 (2)be of + 物质名词,表示主语是由某材料制成或某成分构成,相当于be made of, be built of或be made up of等。例如: The necklace is(made)of glass.这项链是玻璃制的。 The bridge is (built)of stone.这桥是由石头构筑的。 Our class is (made up)of over 50 students. 我班有50多个学生。 (3)be of + 抽象名词(如value, importance,use, help等),of表示“具有、具备”等意思,of不能省,这一结构相当于be+该抽象名词相应的形容词。例如: They are of great help/ very helpful to learners of English.他们对英语学习者来说是很有帮助的。 In fact, sports and games can be of great value/very valuable.事实上体育运动是很有价值的。 The book is of no use/useless to us.这书对我们无用。 It is of great importance/very important to study English.学习英语很重要。 因此,根据上述(1),(2)点可以看出,课文句中第一个be of 结构表示“具有”,第二个be of(承前省去be)表示“由……制成的”。全句汉语意思为:“硬币的大小、重量、形状可能各不相同,并由不同的金属制成。” because;because of 二者均表示“因为”,区别是: because是从属连词引导原因状语从句;而because of是一个合成介词,其后接名词、代词、动名词或what从句组成介词短语。如: I went back not because of the rain,but because I was tired.我回去不是因为下雨,而是因为我累了。 Her face turned red because of what he said.他的话使她脸红了。 become experienced at对……有经验 experienced adj.有经验的,老练的 be experienced in He’s very experienced in money matters. experience n.经验,体验(in(of)/doing) My father has ten year’s experience in teaching. beeline n.两地之间的直线;捷径(指蜜蜂采蜜后径直飞向蜂房,这条路叫beeline) (1)make a beeline for sb./sp.走近路;走直路;向……直行 As soon as the meeting was over, he made a beeline for the pub.会议一结束,他就直接上了酒吧。 If you want to catch up with them, you’d better make a beeline for them. 如果你想赶上他们,你最好抄近路去。 (2)in a beeline 成直线地,笔直地 The pupils went to the museum in a beeline. 孩子们直接走向博物馆。 ![]() |
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