比较and和or
①并列结构中,or通常用于否定句,and用于肯定句。
②但有时and 也可用于否定句。请注意其不同特点:
There is no air or water in the moon.
There is no air and no water on the moon.
在否定中并列结构用or 连接,但含有两个否定词的句子实际被看作是肯定结构,因此要用and。
比较so和 such
其规律由so与such的不同词性决定。
such 是形容词,修饰名词或名词词组;
so是副词,只能修饰形容词或副词;
so 还可与表示数量的形容词many,few,much, little连用,形成固定搭配。
so + adj. such + a(n) + n.
so + adj. + a(n) + n. such + n. (pl.)
so + adj. + n. (pl.) such +n. (pl.)
so + adj. + n. [不可数] such +n. [不可数]
so foolish such a fool
so nice a flower such a nice flower
so many/ few flowers such nice flowers
so much/little money. such rapid progress
so many people such a lot of people
so many 已成固定搭配,a lot of 虽相当于 many,但 a lot of 为名词性的,只能用such搭配。
so…that与such…that之间的转换既为 so与such之间的转换。