Unit 3 语法思维导图及专练-2023-2024学年八年级英语上册基础知识专项讲练（人教版）

Unit 3 I’m more outgoing than my sister.（语法讲练） 【知识导图】 【要点拓展】 1.比较级中倍数的表达： （1）表示倍数时，用“twice/…times+as+形容词原级+as”。 This box is twice as large as that one.这个箱子的大小是那个箱子的两倍。 The house is three times as big as ours.这所房子是我们的房子的三倍大。 （2）表示半数时，用“half as+形容词原级+as”。 This bridge is half as long as that one.这座桥是那座桥长度的一半。 Their room is half as big as ours.他们的房间是我们房间的一半大。 （3）倍数+the size（amount、length...）of...需注意的是，一半倍数用half，一倍用once，两倍用twice或double，当倍数大于等于3时，用“基数词+times”来表示。 This river is twice the depth of that one. 这条河是那条河的二倍深。 2.表示“两者中比较……的”，用“the+比较级+of the two”。 This apple is the bigger of the two.这个苹果是两个中较大的。 3.表示两者之间进行选择，用“Which/Who is+比较级，A or B？”。 Which is bigger, the sun or the moon?太阳和月亮哪个大？ 4.比较级前用“数词+名词”表示确定的度量。 Tom is two years older than I/me.汤姆比我年长两岁。 5.原级比较中的“not as/so…as…”可以转换为“比较级+than…”。 Jim is not as tall as Jack.吉姆不如杰克高。 = Jack is taller than Jim.杰克比吉姆高。 = Jim is shorter than Jack.吉姆比杰克矮。 6.much，far，a lot，a little，a bit，even，a few，still，rather，any...可修饰形容词或副词的比较级，最常用的词为前6个，即“3多（much，far，a lot）、2少（a little，a bit）1甚至（even）”。 Annie decides to work much harder and get better grades next year. 安妮决定更努力地工作，在明年获得更好的成绩。 【奇思巧计】 两者比较than来连，三者比较the在前； 同级比较用原形，as…as冲前线； 若是not as/so…as，前弱后强不同一。 原级变成比较级，er结尾要牢记。 一般情况直接加，单辅重闭双写加。 辅音加y变i加，以e结尾去e加。 少数部分双音节，规则如同单音词。 其余双音多音节，词前加more就可以。 【同步检测】 一、单项选择 1．—What do you think of jumping? —I thinks it is much ________ than sit-ups. A．easy B．easier C．easiest D．the easiest 2．________ children there are in a family, ________ their life will be. A．The less, the better B．Fewer, richer C．The fewer, the better D．More, poor 3．Now more people have lunch in their offices, so fast food and takeaway food are getting ________. A．the most popular B．more and more popular C．the less popular D．less and less popular 4．Jogging is ________ than many other sports—to start, just get some comfortable sports clothes and good running shoes. A．cheap B．cheaper C．expensive D．more expensive 5．It’s always ________ to build bridges than to build walls. A．good B．bet