一、enough to的用法
例：他跑得不够快。He didn’t run fast enough.
没有足够的食物。There are not enough food.
【拓展】enough也可以做名词，可以解释为“足够，充分”
例：I have eaten enough, Thank you. 我已经吃饱了，谢谢。
2.我们可以用“形容词+enough +to do”的结构来描述一个人的品质和能力。例：He is tall enough to reach the top of the fridge. 他足够高可以够到冰箱顶上。He is strong. He can lift it. He is strong enough to lift it. 他强壮地可以举起它。
3.这个结构可以用so ……that……(如此……以至于……）代替，that后面加从句
He is so strong that he can lift it. 他是如此强壮以至于可以把它举起来。
4.还可以用“形容词+enough for sb. to do ”这个结构表示“……对某人来说足够……”
例：这本书很容易，你能够看懂。The book is easy enough for you to read.
练习：
( ) 1.I have ____________ to tell you.
A.something enough interesting C.something interesting enough
B.interesting something enough D.enough something interesting
( )2. He ran and ran, but he couldn’t run _____________ to catch the bus.
A.fast enough B,enough quickly C.enough fast D.enough quickly
( )3. Mike is twenty years old, he is _______________ drive a car.
A.old enough going to C.enough old to go to
B.old enough to go to D.enough old to going
我的弟弟已经足够大去上学了。
My brother is _______ _________ ___________ to go to school.
我有足够的钱买这本书。
I have ________ _________ __________ ________ this book.
改成同义句
He ran so fast so that he caught the train.
He ran _______ _______ __________ catch the train.
He is very clever and he often work out many difficult problems.
He is ________ __________ ______ work out many difficult problems.
二、too…to…的用法
1. too …to…的意思是“太……而不能……”too后面是跟形容词或副词的，to 是不定式的标志，后加动词原形。这个结构用在句子中意义上通常表示否定。例: He is too poor to buy a new coat. 他穷得买不起一件新衣服。
2.还可以用“too+形容词+for sb. to do ”这个结构表示“对某人来说太……而不能……”
例：The box is heavy. The boy can’t carry it. = The box is too heavy for the boy to carry.
This story is too difficult for me to understand. 这个故事太难，我不能理解。
3.当too前面有否定词比如never, not, nothing等时，句子表示肯定。
例：You’re never too old to learn. 活到老，学到老。
<…to…可以和enough to do和so ……that……转换
①too…to…和enough to do 转换时，注意enough 前面的形容词和too前面的形容词要互为反义词
She is too young to do the work .= She isn’t old enough to do the work.
②too…to…和so ……that……转换时，that 后面的句子要用否定句。
She is too young to do the work. = She is so young that she can’t do the work.
<还有太的意思
too many /much ____________ much too _______________
当too后面跟happy, glad, sad等表示感情的单词时too…to…表示肯定意义。He is too sad to hear the bad news. 听到这个不好的消息他太悲伤了。
练习
( ) I feel __________ tired after doing ____________ work.
A.much too; much too C.too many; too much
B.much too; too much D.much too; too many
( ) The old man is _________ angry ________ say a word.
<; to
<; too
<; too
<; to
翻译句子
这箱子太重我搬不动。（三种方式）
The box is _________ heavy for me _________ ___________.
The box is _________ heavy _________ I __________ carry __________.
The box __________ light __________ ____________ me ___________
____________.
这个房间太小了，五个人住不下。
The room is _______ ________ _________ five people can’t _________ _________ _________.
The room _________ big ___________ ___________ five people _______ ________ _________.
The room is ________ small _________ five people __________ ___________
___________.
