学校:_____姓名:_____班级:_____考号:_____ Unit 5 Good Manners 重点语法:enough...to...和too...to...的用法精讲练 语法知识精讲 enough...to... 和 too...to... 的用法 这两个结构都用于表达“程度与结果”的关系,但含义和用法截然不同。 1. enough...to...(足够……以至于……) 表示“达到某种程度,能够做某事”,是肯定意义。 结构: - 形容词/副词 + enough + to do sth - enough + 名词 + to do sth 例句: - He is old enough to drive. (他年龄足够大,可以开车了。) - She runs fast enough to win the race. (她跑得足够快,能赢得比赛。) - We have enough time to finish the project. (我们有足够的时间完成这个项目。) 否定形式:not enough...to...(不够……以至于不能……) - The boy is not tall enough to reach the shelf. (这个男孩不够高,够不到架子。) 2. too...to...(太……以至于不能……) 表示“超出某种程度,导致无法做某事”,是否定意义。 结构: - too + 形容词/副词 + to do sth 例句: - He is too young to drive. (他太小了,不能开车。) - The box is too heavy to carry. (这个箱子太重了,搬不动。) - She was too tired to continue working. (她太累了,无法继续工作。) 特殊情况: - 如果句子主语和不定式(to do)的主语不同,可以加 for sb: - The coffee is too hot for me to drink. (咖啡太烫了,我没法喝。) 3. 对比 enough...to... 和 too...to... | 结构 | 含义 | 例句 | | enough...to... | 足够……可以…… | She is strong enough to lift the box. | | too...to... | 太……以至于不能…… | She is too weak to lift the box. | 4. 常见考点 1. enough 的位置: - 形容词/副词后(old enough) - 名词前(enough money) 2. too...to... 本身就含否定,不能再加 not: - He is too not old to drive. (错误) - He is too young to drive. (正确) 3. so...that... 替换: - He is too tired to walk. = He is so tired that he can’t walk. 语法知识精练 一、单项选择(每小题2分,满分80分) 1.He was too _____ to cut himself with the knife. A.careful B.carefully C.careless D.care 【答案】C 【详解】句意:他太粗心了,以至于用刀割伤自己了。A.careful小心的,形容词;B.carefully仔细地,副词;C.careless不小心的,不仔细的, 粗心的,形容词;D.care照料,照顾,动词。根据too后面跟形容词或副词,该句的动词是be动词,此处用形容词而不接副词。故排除B和D;根据句意可知,此空是不小心的,不仔细的, 粗心的意思,故排除A,故选C。 2.—What do you think of this idea —I think it’s _____ difficult _____ keep. A.too, to B.so, that C.enough, to D.to, to 【答案】A 【详解】句意:———你觉得这个主意怎么样?———我认为它太难保存了。 考查短语辨析。too...to...太……而不能,to后接短语;so...that...如此……以至于……,that后接句子;enough...to...足够……做……。空后是keep,不是句子,故排除B;根据“difficult”和“What do you think of this idea”可知,是太难得保存,故选A。 3.—During this hard time, it is _____ to have lots of food to eat. —Yeah, I agree. We really shouldn’t complain too much. A.good enough B.bad enough C.too good D.too bad 【答案】A 【详解】句意:———在这么艰难的时期,能有足够的食物已经非常好了。———是的,我认同。我们不应该抱怨太多。 考查形容词辨析和enough用法。good好的;bad坏的;too ... to ...太……以至于不能 ... ...