數 詞

　　大綱要求

　　基數詞及其用法;序數詞的構成及其用法;分數詞的構成;小數的用法。

　　一、基數詞及其主要用法

　　表示數目的詞稱基數詞。15 fifteen，幾百幾千不加s，242 two hundred and forty-two，5058 five thousand and fifty-eight，9，600，000 nine million six hundred thousand

　　1.基數詞可以用于數字的計算。

　　6+8=14 Six plus eight is fourteen.

　　9-7=2 Nine minus seven is two.

　　7X5= 35 Seven times five is thirty-five.

　　8÷4=2 Eight divided by four is two.

　　2.基數詞可以表示人的大致年齡和年代。

　　He died in his fifties.

　　This took place in 1990s/1990s.

　　The professor became successful in his thirties.

　　3.基數詞可以用來表達年份、時間、電話號碼。

　　1700 seventeen hundred

　　1814 eighteen fourteen

　　9：20 nine twenty

　　11：30 eleven thirty/ half past eleven

　　5：45 five forty-five/ a quarter to six

　　88760231 eight eight seven， six zero two， three one

　　4.基數詞可以用于編號。

　　Number six， line 4， page 19， Bus(No.) 332， Platform (No.) 5， Room 101

　　5.基數詞可以和其他詞一起構成合成形容詞，在句子中作定語。

　　A one-month-old baby can recognize its mother by smell.

　　This eleven-month-old baby can speak a few words.

　　(The baby is eleven months old.)

　　The teacher asked us to write a four-thousand-word essay as our homework.

　　(There are four thousand words in the essay.)

　　This four-paragraph essay is too difficult for me to understand.

　　(There are four paragraphs in this essay. )

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