【文章內容簡介】 e two old women waiting for you at the gate.在正式文體中，該句式中be動詞的單復數形式取決于以下兩種情況：（1）該句式中只有一個主語，主語為單數時，be動詞用單數；主語若為復數，be動詞也用復數。（2）該句式中有幾個并列主語，則按就近原則處理，即與靠近be動詞的第一個主語保持一致。例如：1) There is a pen on the desk.2) There are three apples on the table.3) There is a dictionary and two pens on the desk.4) There are two pens and a dictionary on the desk.3. there be句型與have的區(qū)別：there be 句型和have都表示“有”的含義。區(qū)別如下：there be表示“某處存在某物或某人”；have表示“某人擁有某物/某人”，它表示所有、擁有關系。.① He has two sons. 他有兩個兒子。② There are two men in the office. 辦公室里有兩個男人。語法專項（三）（一）數詞數詞的定義：表示“多少”和“第幾“的詞,叫數詞。其用法相當于名詞或者形容詞。數詞分為基數詞和序數詞兩種?；鶖翟~：表示數目的詞是基數詞，最基本的數詞如下：1 one, 2 two, 3 three, 4 four, 5 five, 6 six, 7 seven, 8 eight, 9 nine, 10 ten,11 eleven, 12 twelve, 13 thirteen, 14 fourteen, 15 fifteen, 16 sixteen, 17 seventeen, 18 eighteen, 19 nineteen, 20 twenty, 30 thirty, 40 forty, 50 fifty, 60 sixty, 70 seventy, 80 eighty, 90 ninety,100 a hundred, 1,000 a thousand, 1,000,000 a million, 1,000,000,000 a billion.基數詞 112 是獨立單詞，需逐個記憶?；鶖翟~13 19是個位數詞的詞干后加teen 構成。其中 thirteen, fifteen, eighteen, 變化不規(guī)則?；鶖翟~ 20—90 是在十位數詞后面加 ty 構成?；鶖翟~ 21—99 是在十位數詞后面加上個位數詞合成，中間加上連字符“”。例如：21 twentyone?；鶖翟~三位以上的數詞，在百位和十位之間，一般要用連詞“and”。例如：342 three hundred and fortytwo表示“萬”的詞英語中沒有，如1萬可用10千來表示：ten thousand. 30萬可用 three hundred thousand 來表示?！镜湫屠}】例題1There are ______ days in a year.A. three hundreds and sixty five B. three hundred and sixty fiveC. three hundred and sixty five D. three hundred sixty five例題2—How long is the river? — It’s _____ metres.A. about three hundreds and seventeen.B. about three hundred seventeen.C. about three hundred and seventeen. D. about three hundreds seventeen.基數詞的用法：從句子成分上分析，基數詞在句中可用作主語，賓語，表語等。Four of them went to the factory. 他們四個人去了工廠。（主語）I want two. 我要兩個。(賓語）My classmate is eighteen. 我的同學十八歲。(表語)1）編號的事物用基數詞：Today we are going to study Lesson Six. 今天我們要學習第6課。He lives in Room 801. 他住在801房間。a 用No. No（讀Number）后加數字，數字讀基數詞。如： Number One, bus Number Three busb 用基數詞 詞序為：名詞（詞首字母大寫）+ 基數詞（如用英語拼寫，詞首字母也要大寫）如：Lesson One, Class Four, World War Two。此種方法較常見，特別是當數字較長時。如：Room 306, Middle School。注意：編號也可以用序數詞 詞序為：the + 序數詞 +名詞 如：the first lesson, the Second World War例題3Jim is in ______ Middle School.A. th B. 7 th C. 7 No. D. 例題4I think _____ lesson is the most difficult in this book.A. five B. the fifth C. fifth D. the five2）表示“年，月，日”時可以用基數詞。I was born in 1971. 我生于1971年。例題5His sister was born_______.A .in 1998, Octorber21 B. on 1998, Octorber21 C. in Octorber21,1998 D. on Octorber21,19983）表示“幾點鐘，幾點過幾分”用基數詞。 It’s two o’clock. 現在是二點鐘。It’s five fifteen. 現在5點15分。例題6What time is it? It’s (2:40).A. forty past two B. two past fourC. twenty to three D. twenty to two例題7He stays here for ______.A. two and half hours B. two hours and half C. two hours and a half D. two half hours4）用于加減乘除的數字用基數詞。 One plus two is three. 一加二等于三。5）表示大幾倍或者小幾倍用基數詞。 Five times six is thirty. 五乘以六得三十。6）表示百分數用基數詞。 Thirty percent of them is water. 它們當中有30%的水。7）表示分數時，分子數字用基數詞，但分母要用序數詞，如分子不是1，序數詞要用復數形式。Onethird of the books are mine. 三分之一的書是我的。Two fifths of the students are girls. 五分之二的學生是女生。例題8（05 河北）This is a big class, and ____ of the students are boys.A. two third B. second three C. two thirds D. two three8）表示有小數的詞用基數詞。 five point five注意：1）用復數形式修飾名詞使用of+名詞復數hundreds of 數以百計thousands of 數以千計tens of thousands