仁愛英語（2024版）七年級下Unit8語法講解與練習答案【語法點1】數詞【點撥】一、大數的書寫規則·三位分節法：從右至左每三位加逗號，單位依次為千（thousand）、百萬（million）、十億（billion）、萬億（trillion）。示例：1,000

→

onethousand10,000

→

tenthousand1,000,000

→

onemillion1,000,000,000

→

onebillion·逗號的作用：分隔位數，便于讀寫。例：45,390

→

forty-fivethousand,threehundredandninety93,000,000

→

ninety-threemillion二、大數的讀法規則·逐節讀法：按逗號分隔的單位依次讀出。示例：6,363,000

→

sixmillion,threehundredandsixty-threethousand1,386,000,000

→

onebillion,threehundredandeighty-sixmillion909,090,009,900

→

ninehundredandninebillion,ninetymillion,ninethousand,ninehundred·特殊規則：百位與十位之間加

and（英式英語常見）。例：1,250

→

onethousandtwohundredandfifty千位后的逗號讀作

thousand，百萬位后讀作

million，依此類推。三、基數詞的用法·基本功能：表示具體數量，修飾可數或不可數名詞。

例：threebooks（可數名詞復數）fivebottlesofwater（不可數名詞）·單復數規則：單位詞（thousand,million等）前有具體數字時用單數形式。例：twothousandstudents（不加s）表示約數時用復數形式。例：thousandsofpeople（加s）【典例】一、填空題1.4,186

→

______thousand,______hundredandeighty-six.【答案】four;one2.45,390

→

forty-five______,threehundredand______.【答案】thousand;ninety3.1,386,000,000

→

onebillion,threehundredandeighty-six______.【答案】million4.909,090,009,900

→

ninehundredandnine______,ninety______,nine______,ninehundred.【答案】billion;million;thousand二、選擇題1.

下列哪個數字讀法正確？A.6,300

→

sixthousandandthreehundredB.93,000,000

→

ninety-threethousandC.1,000,000

→

onehundredthousand【答案】A2.

選擇正確的讀法：307,000,000A.threehundredsevenmillionB.threehundredandseventhousandC.thirty-sevenmillion【答案】A一、單詞拼寫1．Thereare

(hundred)ofbooksinourclassroom.【答案】hundreds2．Thereareovertwo

(thousand)studentsinthatschool.【答案】thousand3．Thereareovernine

(million)peopleinHefei.【答案】million4．Thereare

(hundred)ofpeopledancingatthesquareaftersupper.【答案】hundreds5．Inourschool,wehavemorethanthree

students.(千)【答案】thousand6．Look!Therearen

(十九)flowershere.Theyarenice.【答案】(n)ineteen7．Thereare

(thirty)daysinApril.【答案】thirty8．Thereare

(七)daysinaweek.【答案】seven9．Twoandsixis

(八).【答案】eight10．SheisinClass

(六),GradeSeven.【答案】Six【語法點2】祈使句【點撥】一、祈使句的定義與功能·定義：祈使句用于表達命令、請求、建議或勸告，通常省略主語（you），直接以動詞原形開頭。·功能：命令：Closethedoor.（關門。）請求：Pleasehelpme.（請幫我。）建議：Let’sgoforawalk.（我們去散步吧。）勸告：Don’tbelate.（別遲到。）二、祈使句的結構·肯定形式：動詞原形

+

其他成分：Savewater.Let’s+

動詞原形（建議）：Let’sprotecttheenvironment.·否定形式：Don’t+

動詞原形：Don’twastetime.Never+

動詞原形（語氣更強）：Nevergiveup.（永不放棄）Let’snot+

動詞原形：Let’snotargue.（讓我們不要爭論了。）No+

現在分詞（表示禁止）：Nosmoking.（禁止吸煙）·禮貌表達：在句首或句尾加

please：Closethewindow,please.（請關上窗戶。）三、考點與易錯點·No+

現在分詞：結構：No+

動詞-ing（表示禁止某種行為）。錯誤示例：?

Nosmoke.?

Nosmoking.·常見搭配：Noparking.（禁止停車）Noswimming.（禁止游泳）·主語省略：祈使句的主語

you

必須省略。錯誤示例：?

Youclosethedoor.?

Closethedoor.·動詞原形：祈使句必須以動詞原形開頭。錯誤示例：?

Tosavewater.?

Savewater.【典例】一、單項選擇1.

選擇正確的祈使句：A.Youclosethedoor.B.Closingthedoor.C.Closethedoor.【答案】C2.

選擇正確的禁止標志：A.Noswim.B.Noswimming.C.Don’tswimming.【答案】B3.

選擇正確的否定祈使句：A.Don’ttowastetime.B.Don’twastetime.C.Don’twastingtime.【答案】B二、適當形式填空1.

___________(save)water,saveourplanet!【答案】Save2.

_________________(notlitter)inthepark.【答案】Don’tlitter3.

______(禁止)parkinghereafter10PM.【答案】No4.

Let’s______(make)aposteraboutsavingenergy.【答案】make三、完成句子1.

Don’tforget_________________(turnoff)thelights.【答案】toturnoff2.

No_______________(smoke)inthisarea.【答案】smoking3.

Let’snot_____________(litter)

rubbisharound.【答案】litter四、句型轉換1.改為祈使句：Youshouldclosethewindow._____________________________________【答案】Closethewindow.