高中英语语法讲解不定式(8)
时间:2026-01-15
时间:2026-01-15
高中英语语法讲解不定式
I’m tall enough to reach the top of the tree.
我够高能够到树顶。
*1. 此句是肯定句时,可以用主+be+so+adj.+that的句型(即so ,that 表示的结果状语从句)来替换。
The boy is so old that he can go to school.
I’m so tall that I can reach the top of the tree.
2. 此句是否定句式时,既可以用so that 引导的结果状语从句来替换,还可以用too to 句式替换。例:
He is not old enough to go to work.
他太小不能去上班。
He is so young that he can’t go to work.
He is too young to go to work. 再如:
The box is not light enough for me to carry.
这个箱子太重我搬不动。
The box is too heavy for me to carry.
The box is so heavy that I can’t carry it.
四. sb. +be ready + to do sth. (某人乐意做某事)
He is always ready to help others.
(他总是乐于帮助别人)
I’m always ready to make new friends.
我总是乐于结交新朋友。
五. It’s +adj. + for / of sb. to do sth.
对某人来说做某事 例:
It’s dangerous for children to play football in the street.
对孩子来说在街上踢足球是很危险的。
It’s good for us to take more exercise.
对我们来说多运动是有益的。
It’s very kind of you to say so.
你这样说真是太好了。
It’s very kind of you to help me.
你真好,肯帮我。
该句式中,引导动词不定式的逻辑主语的介词用for还是of,主要取决于前面的形容词。如果形容词是描述动词不定式的行为者的性格、品质的。如:kind, good, nice, wrong, right, clever, careless, foolish等,应用of;如果形容词仅仅是描述事物,不是对动词不定式的行为者的品质进行评价的,就用for. 常见这类形容词有difficult, easy, hard, important, dangerous等。
It’s wrong of you to do it.
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