知识探索
◆词汇学习
A。重点单词
1。tentative
观察示例
adj。
。.。，then try a tentative guess about what Peking Man might have done and ud thousands of years ago。
We have made a tentative arrangement to meet next month.
I can only give a tentative opinion。
The shy girl gave us a tentative smile.
归纳拓展
tentative 其意义为“暂定的，犹豫的”,在句中可作前置定语或表语.
即时练习
单项填空
(1) Our vacation plans are still _____.We don’t know where to go.
x甸A.attentive B.attend
C。tentative D。tent
（2) We have made a _______ offer—we shall make it clear as soon as possible。
A.sure B。certain
C。clear D.tentative
(1）答案：C
（2）答案：D
完成句子
（1）His attempts to walk are still_______（犹豫不决）。
(2）We made a _______ ______（初步结论)。This plan will be further discusd。
(1)答案：tentative
（2)答案：tentative conclusion
君子兰苗句型转换
泰礴顶
(1)We hesitated about what we will do next。
雍正年妃What we will do next_______ _______ .
（2）When she saw me，she gave me a forced smile.
______me,she gave me a______ smile。
（1）答案：was tentative
（2）答案：Seeing,tentative
2.ample
观察示例
adj.
After that they would have had to rub an ample amount of salt.
With ample moisture stored in the subsoil，the crops matured rapidly。
We have ample money for the journey.
The car has an ample trunk.
归纳拓展
ample足够的，富裕的；宽敞的，大的.adequate指数量或质量刚好达到一般要求；sufficient着重指足够满足物质或精神方面的需要，有时可与enough换用；enough多指足够满足某种物质需要。
即时练习
单项填空
(1）Your stay abroad will give you_______ opportunities to learn a new language.
A。much B.sufficient
C。enough D。ample
（2）There is room for an_______ garden.
A.big B。great
C.enough D.ample
(1)答案：D
(2)答案：D
完成句子
(1)There is _______（足够的）food for all.
(2)Two pounds of apples will be________(足够的）. 什么是中央空调
（1)答案：ample/enough/sufficient
(2）答案：sufficient/enough
句型转换
(1)Take a rich supply of food,for we shall be gone all day.
We must be_____ ______ _______ food,for we shall be gone all day。
（2)There is enough room for all of you in the car。
There is_______ room for you _______ in the car。
(1）答案:supplied with ample
苍井空作品全集
（2）答案：ample，all
3。alternative
观察示例
n。
Can you think of the alternatives we would u today ?
adj.
I offered the alternative suggestions of spending the vacation in the mountains or by the a。
The way was blocked,so we had to go by alternative road。
I had no money,so I had no alternative to staying at home。
归纳拓展
alternative既可作名词,也可作形容词。作名词时为可数名词，表示“选择(二选一)",构成have no alternative but to do something；作形容词，表示“替代的，选其一的”。其动词形式为alternate“交替，轮流"。
即时练习
单项填空
（1)Night and day_____ .
A。change B。alternate
C.exchange D。alternative
(2)In this school,the students have three _____ cours and ven______ cours。
A。required；alternative
B.requiring；alternative
C。require;alternate
D。require；alternative
(1)答案：B
(2)答案：A
完成句子
(1）The plan is an _____(替换)to that one
（2）It will take a long time to develop______（替换)energy resources.
（1）答案：alternative
(2)答案:alternative
清朝灭亡的原因句型转换
（1)I have nothing to do but give the plan up。
I have _______ _______ ________ to give the plan up/
(2）There is no other way open to her.
There is_______ _______ way that is open to her.
(1）答案：no alternative but
(2）答案:no alternative
4.prerve
观察示例
v。 顿号在中间
Yes and so well prerved.
Policemen prerve order in the streets。
Salt prerves food from decay.
