1、1/3一、一、enough to 的用法的用法1.enough 意思是意思是“充分地充分地,足够足够”,放在名词之前放在名词之前,形容词形容词、副词之副词之后。后。例:他跑得不够快。He didnt run fast enough.没有足够的食物。There are not enough food.【拓展】【拓展】enough 做名词,为做名词,为“足够,充分足够,充分”。例:I have eaten enough,Thank you.我已经吃饱了,谢谢。2.“主语主语be 动词形容词动词形容词+enough+to do”“主语行为动词主语行为动词副词副词+enough+to do”描述一个人
2、的品质和能力描述一个人的品质和能力,表示表示“某人足够某人足够去做某事去做某事”。He is tall enough to reach the box.他足够高可以够到盒子。He runs quickly enough to win the race.他跑足够快,赢得了比赛。3.如果强调如果强调“对某人来说足够对某人来说足够”,则把,则把“for sb.”用在动词用在动词不定式之前。不定式之前。The book is easy enough for you to read.二、二、too to的是的是“太太而不能而不能”1、“主语主语be 动词动词too形容词形容词+to do”“主语行为动词
3、主语行为动词too副词副词+to do”,表示否定的结果。,表示否定的结果。例:He is too poor to buy a new coat.他太穷了不能买一件新衣服。He studies too carelessly to get high marks.他学习太粗心了,不能得高分。2.用用“too+形容词形容词/副词副词 for sb.to do”表示表示“对某人来说太对某人来说太而不而不能能”2/3This story is too difficult for me to understand.这个故事太难,我不能理解。3.当当 too 前面有否定词比如前面有否定词比如 never,n
4、ot,nothing 等时,句子表示肯定等时,句子表示肯定。例:Youre never too old to learn.活到老,学到老。注意:当动词不定式和句子的主语存在逻辑上的动宾关系时,不定式的动词要使用及物动词或不及物动词加介词。The room is big enough to live in.The pen is too small to write with.4.too to可以和可以和 enough to do 和和 so that 转换转换too to 和和 enough to do 转换时转换时,enough 前面的形容词和前面的形容词和 too前面的形容词要互为反义词前面
5、的形容词要互为反义词She is too young to do the work.=She isnt old enough to do the work.enough to 和和 so that 转换时,注意转换时,注意 that 后面要用后面要用肯定句。肯定句。He is tall enough to reach the box.=He is so tall that he can reach the thebox.He runs quickly enough to win the race.=He runs so quickly that he canwin the racetoo to
6、 和和 so that转换时,转换时,that 后面用否定句。后面用否定句。She is too young to do the work.=She is so young that she cant do thework.5.too 还有还有“太、非常太、非常”的意思的意思3/3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。She is too willing to be a dancer.她太想成为一个舞蹈家了。当 too 前面有 only,all,but 时,too to 表示肯定意义I am only too happy to help you.我非常开心去帮助你。
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