Unit 5 Good manners
Period 4 Grammar
【学习目标】
To learn the use of “enough to” and “ too ... to ...”
【课前预习】
1.他够仔细的_______________ 2.年龄太小不能上学______________
3.我们有足够的信心通过这次英语测试___________________________________________
4.他个子高,能够得到冰箱上的盒子________________________________________________
5.这个题目太难,我做不出来.______________________________________________________
6.参加讨论________________ 7.清楚地表达自己________________
8.记下所有要点_____________ 9.忙于舞蹈课___________________
【知识点拨】
1.be +形容词+enough+动词不定式to do (某人或物)足够。。。
He is the problem 他足够聪明，能解决这个问题。
The girl is the apple on the table
这个女孩不够高，够不着桌上的苹果。
2.too…to… 结构的用法
（1）too…to…的基本用法 意义上却是否定的，表示“太。。。而不能。。。”
He is the army.他年龄太小，不能参军。
（2） 动词不定式的逻辑主语。动词不定式所标示的动作的执行者与整个句子的主语不指同一人或物时，需要在动词不定式前加上一个逻辑主语，（常用for sb.）
The maths problems is too to .
这道数学题太难我解不出来。
（3）不定式是否带宾语.在通常情况下，too…to…结构中的不定式可根据其是否及物来
确定它是否带宾语。
eg. He is any further.他太累了，不能再往前走了。
She is such a nice a dress.
她太穷，买不起那件漂亮的连衣裙。
但是，若句子主语与其后不定式有动宾关系，那么，其后的及物动词不定式不能带宾语。如：
eg. The nice dress is too .
这件漂亮的连衣裙太贵了，她买不起。
<注意> 若句子主语与其后不定式有动宾关系，且其中的动词为不及物动词，此时应注意在其后加适当的介词。
eg. The room is .
这房间太脏，不能住。(句末的介词in不可省略)
（4）将too...to...结构转换为so... that... 结构时，要注意：
A.so... that... 结构是复合句,so 的后面接形容词或副词的原级， that的后面接从句。
B.that后面的从句要用否定形式。
eg. 1)The box is too heavy for me to carry.
→ The box is that I carry it.
2)The child is too young to dress himself.
→ The child is dress himself.
(5)将too...to...结构转换为enough... to... 结构时，要注意：
A.enough 前的形容词或副词应是too前面形容词或副词的反义词；
B.enough... to... 句式须用否定式；
C.too... to...结构有逻辑主语时，enough... to... 结构也要加上逻辑主语。
eg. 1)She is too young to do the work.
= She do the work.
【当堂反馈】
同义句转换。
1.He ran so fast that he caught the train.
He ran ____________ ______________ _______________ catch the train.
2.Jenny is very creative and she often comes up with some new ideas.
Jenny is _____________ ____________ _____________ come up with some new ideas often.
3.Little Jim is not old enough to go to school.
Little Jim is _____________ ____________ _____________go to school.
4.The stone is too heavy for me to carry.
The stone is ____________ light ________________ for me to carry.
5.Millie is so energetic that she can be the host of the party.
Millie is _____________ ____________ _____________ be the host of the party.
6.The box is so heavy that I can’t carry it.
The box is _______ ________ heavy _____________ ____________ _____________ carry.
7.The maths problem isn’t easy enough for me to work out.
The maths problem is _________________ difficult _________________ I can’t work it out.
8.The book is interesting enough for everybody to read.
The book is __________________ interesting _________________ everybody likes to read it.
【巩固提升】
一、 句型转换[来源:Zxxk.Com]
1. The box is so heavy that I can’t carry it.
The box is _________heavy _____ ________ ________ ________.
The box isn’t _______ ________ _____ ________ ________ ________.
It’s _______ ______ ______ box _______ I can’t carry it.
2. The problem isn’t easy enough for me to work out .
The problem is ________ difficult ________ ________ ________ work out.
The problem is __________ difficult ________ I can’t work _________out.
3. Tom is very clever and often gets good marks in his exams.
Tom is ________ ________ ________ _______ good marks in his exams.
4. The water is so dirty. We can’t drink it.
The water is _______ ________ _______ _________ _________ drink.
The water isn’t _______ ________ _______ _________ _________ drink.
5. The ice is so thin that people can’t skate on it.
The ice isn’t _________ _________ for people _______ _______ ________.
The ice is ________ _______ for people ________ ________ _________.
6. The girl is too fat to wear a skirt.
The girl is_
______ _______ _______ to wear a skirt.
Th
e girl is_______ _______ _______ _______ _______ wear a skirt.
7. Li Lei is hard-working enough to do all kinds of things.
Li Lei is_______ hard-working_______ ________ _______ do all kinds of things,
