二、词形变换
1. sing(名词)
3. excellent(名词)
1. sing(名词)
singer
2. life(复数)lives
3. excellent(名词)
excellence
4. free(反义词)busy
答案：1. singer 2. lives 3. excellence 4. busy
★考点1 与good搭配的短语
(1)be good at表示“擅长……”,后接名词、代词或动名词。相当于do well in。
I am good at English. 我擅长英语。
Mike is good at swimming. 迈克擅长游泳。
(2)be good with意为“与……相处得好”(关系好)。
He is very good with the children. 他与这些孩子处得很好。
(3)be good for意为“对……有好处”。
Vegetables are good for your health. 蔬菜对你的健康有好处。
【例1】Miss Sun is good ______ drawing, and she is good ______ kids in the art club.
A. at; for B. with; for C. for; at D. at; with
【例2】Reading is good ______ us.
A. with B. at C. for
(1)be good at表示“擅长……”,后接名词、代词或动名词。相当于do well in。
I am good at English. 我擅长英语。
Mike is good at swimming. 迈克擅长游泳。
(2)be good with意为“与……相处得好”(关系好)。
He is very good with the children. 他与这些孩子处得很好。
(3)be good for意为“对……有好处”。
Vegetables are good for your health. 蔬菜对你的健康有好处。
【例1】Miss Sun is good ______ drawing, and she is good ______ kids in the art club.
A. at; for B. with; for C. for; at D. at; with
D
【例2】Reading is good ______ us.
A. with B. at C. for
C
答案：D；C
解析：
例1：第一空后为drawing（动名词），表示“擅长画画”，用be good at；第二空后为kids（名词），表示“与孩子相处好”，用be good with，选D。例2：表示“对我们有好处”，用be good for，选C。
★考点2 We learn how to work out maths problems in class. 我们在课堂上学习如何解数学题。
不定式可以和wh - 词who, what, which, when, how, where等连用,构成不定式短语,在句子中做主语、宾语、表语等。此句中为“wh - 词+动词不定式”做宾语。
I don't know what to say. 我不知道说什么。(宾语)
Where to stay for the night is a problem. 在哪儿过夜是个问题。(主语)
The question is which to choose. 问题是选哪个。(表语)
拓展 “wh - 词+动词不定式”做宾语时,相当于一个由该wh - 词引导的宾语从句。
Excuse me. Can you tell me how to get to the bookshop?
=Excuse me. Can you tell me how I can get to the bookshop?
打扰了,你能告诉我去书店怎么走吗?
【例3】Now let me tell you how
A.to learn
B.learning
C.learn
不定式可以和wh - 词who, what, which, when, how, where等连用,构成不定式短语,在句子中做主语、宾语、表语等。此句中为“wh - 词+动词不定式”做宾语。
I don't know what to say. 我不知道说什么。(宾语)
Where to stay for the night is a problem. 在哪儿过夜是个问题。(主语)
The question is which to choose. 问题是选哪个。(表语)
拓展 “wh - 词+动词不定式”做宾语时,相当于一个由该wh - 词引导的宾语从句。
Excuse me. Can you tell me how to get to the bookshop?
=Excuse me. Can you tell me how I can get to the bookshop?
打扰了,你能告诉我去书店怎么走吗?
【例3】Now let me tell you how
to learn
Chinese.A.to learn
B.learning
C.learn
答案：A
解析：
本题可根据“wh - 词+动词不定式”的结构来解题。句意为“现在让我告诉你如何学习中文”，“how to do sth.”表示“如何做某事”，在这里“how to learn Chinese”作动词“tell”的宾语。B选项“learning”是动词 -ing 形式，C选项“learn”是动词原形，均不符合该结构。