1.不定冠詞(a,an)的基本用法

2.不定冠詞a,an的區(qū)別

注意:①判斷一個(gè)名詞前用a還是用an,是根據(jù)其讀音,而不是根據(jù)其字母。②在26個(gè)字母中,前面用an的字母有:a,e,f,h,i,l,m,n,o,r,s,x,其他用a。③要注意區(qū)別以“u”開頭的單詞:當(dāng)“u”發(fā)/ʌ/音時(shí),單詞前用an,如an umbrella,an unhappy boy;當(dāng)“u”發(fā)/juː/音時(shí),單詞前用a,如a university,a useful book。

3.含有a的常見固定詞組

a few/little/bit一點(diǎn)兒;have a swim/walk/talk/look/dance/drink/rest游泳/散步/談話/看一看/跳舞/喝點(diǎn)東西/休息;have a cold感冒;have a good time玩得高興;in a hurry匆忙;for a while一會(huì)兒;keep a diary記日記;do sb a favor幫助某人

4.當(dāng)名詞被其他詞修飾時(shí),不定冠詞a或an的位置應(yīng)注意:

(1)當(dāng)名詞被such,half,what,many等修飾時(shí),不定冠詞要放在這些詞之后。He left in such a hurry that he forgot to close the door.他離開得如此匆忙,以至于忘了關(guān)門。It took me half an hour to write the letter.寫那封信花了我半個(gè)小時(shí)。What an interesting book it is!這是一本多么有趣的書啊!Many a man has gone to big cities for work.許多人都到大城市去打工了。(2)當(dāng)單數(shù)名詞前面的形容詞前有so,how,too等詞時(shí),不定冠詞應(yīng)放在形容詞之后。She was so nice a girl that she took the blind man to the station.她是這么好的一個(gè)女孩,她把那位盲人帶到了車站。How nice a film this is!這是一部多么好的電影啊!(3)當(dāng)名詞前面有形容詞和quite或very時(shí),不定冠詞置于quite之后,very之前。quite a good book一本十分好的書a very interesting story一個(gè)非常有趣的故事

記憶口訣:特指雙熟悉,上文已提及,世上獨(dú)無二,序數(shù)最高級(jí),普通專有名,習(xí)語及樂器。

2.用于某些固定短語中

in the morning/afternoon/evening在上午/下午/晚上;in the daytime在白天;in the end最后;all the time一直;at the same time同時(shí);by the way順便說一下;in the open air在戶外;at the age of在……歲時(shí);at the beginning of在……開始時(shí);on the other side of在……的另一邊;in the middle of在……中間;at the moment現(xiàn)在

3.定冠詞和不定冠詞易混點(diǎn)

(1)序數(shù)詞前用定冠詞與不定冠詞的區(qū)別“the+序數(shù)詞”表示“第幾……”;“a+序數(shù)詞(first除外)”表示“又一,再一”。The apple is delicious,and I would like a second one.蘋果很好吃,我想再吃一個(gè)。(2)a number of,the number ofa number of的意思是“一些”;the number of的意思是“……的數(shù)目,……的數(shù)量”,作主語時(shí)謂語動(dòng)詞用單數(shù)形式。A number of students like playing computer games.一些學(xué)生喜歡玩電腦游戲。The number of the students in our school is about 1,500.我們學(xué)校學(xué)生數(shù)目大約是1,500。

練一練

用冠詞a或an填空① hour② European country③ b④ s⑤ orange⑥ unusual story⑦ island⑧ new bike⑨ e-mail ⑩ important invention⑪ useful book⑫ NBA player ⑬ eight-year-old girl ⑭ honest person

an 2.a 3. a 4. an 4. an 5. an 6. an 7. an 8. a 9.an 10. an 11. a 12. an 1

【答案】1.

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