divide/separate

divide 表示把某个整体分为若干部分。 separate 表示把放在一起但又相互独立的人或事物分隔开来。还可用作形容词，意为"单独的"。 助记 　　You had better separate the apples from those which have gone bad.

　　你最好将这些苹果与那些坏了的苹果分隔开。

　　The world is usually divided into seven continents.

　　世界通常被划分成七大洲。

　　用divide/separate的适当形式填空

　　①Mother the pancake into several pieces and gave each child a piece.

　　②The sick chicken should be from the healthy ones，or they will all get sick.

　　③ Please the green apples from the red ones.

　　④ What's six by two.

　　【答案】　①divided　②separated　③separate　④divided

　　3．The school year is divided into two semesters，the first of which is September through December，and the second January through May. (教材P9)

　　一学年分为两个学期，第一学期从九月到十二月，第二学期从一月到五月。

　　本句中the first of which is September through December是定语从句，修饰semesters。此定语从句是由"序数词＋of＋关系代词"引导的。序数词也可换为不定代词、名词、形容词比较级或最高级等。即：名词/不定代词/分数/百分数/形容词比较级(最高级)＋ of＋关系代词(which/whom)。

　　There are 16 girl students here，half of whom have passed the test.

　　这里有16个女学生，她们中的一半已经通过了考试。

　　He mentioned a book，the title of which I have forgotten. 他提到一本书，书名我忘记了。

【提示】　"不定代词/数词/名词＋of＋ which/whom"引导的定语从句是英语语法的重