1、had better（ 常簡略為 d better） 是一固定詞組， had better 最好 ，用于表示對別人的勸告、 建議或表示一種愿 望。其用法有以下幾點(diǎn)：一、 had better 后面必須跟動(dòng)詞原形。had better 后跟動(dòng)詞原形 （ 即不帶 to 的不定式 ） ，構(gòu)成 hadbetter do sth.句型。這里的 had 不能用 have 來替換。如：Youd better go to hospital at once.你最好立即去醫(yī)院看病。Tom, youd better go there today.湯姆，你最好今天去那兒。二、主語不論是第幾人稱，句子不論是什么時(shí)態(tài)，都

2、要用 had better 的形式。如：Now you（he ，we）had better listen to the teacher. 你（他，我們 ）現(xiàn)在最好聽老師講。三、 had better 可用于的時(shí)態(tài)。1.had better用于指現(xiàn)在。如：Now you had better listen to the radio.你現(xiàn)在最好聽收音機(jī)。You had better be quiet.你最好安靜一些。2.had better用于指將來。如：身。We had better buy the more expensive one.It will last much longer and

3、so it will be cheaperin the end. 我們最好還是買貴些的 , 它更經(jīng)久耐用，所以到 頭來，它還是更便宜些。3.had better用于進(jìn)行式，表示講話人提出建議時(shí)，動(dòng)作正在進(jìn)行。如：We had better be watching the TV play.我們最好現(xiàn)在就看到電視劇。We had better be starting back now.我們最好現(xiàn)在就動(dòng)身回去。4.had better + have + V-ed可表示 本該做而沒有做的事 。如：You had better have done it .如果你把那件事辦You had better s

4、tarttomorrow. 你最好明天動(dòng)妥就好了。 （ 但實(shí)際上你沒有那樣做 ）You had better have stayed with us .要是當(dāng)時(shí)你和我們呆在一起多好啊。 （ 實(shí)際上沒有 ）四、 had better 的否定式。如： 常用的否定形式是將否定副詞 not 直接放在 had better 的后面。如：You had better not miss the last bus.你最好不要錯(cuò)過末班公共汽車。You had better not leave for Nanjing the day after tomorrow.你最好后天不要?jiǎng)由砣ツ暇Ｗ⒁猓悍穸ǜ痹~ not

5、絕不能放在 had 的后面。如：不 能說 ：You hadnt better go. 而 應(yīng) 該 說： You had better not go.五、 had better 的疑問式。had better通常不以普通疑問句的形式出現(xiàn)。但有時(shí)用于否定疑問句， 常用 Hadnt+ 主語 +better.? 結(jié)構(gòu) , 作為 一種勸告形式，比肯定形式的語氣更婉轉(zhuǎn)一些。如：Hadnt you better take an umbrella?你不認(rèn)為該帶一把傘嗎 ?Hadnt you better ask him first?你不認(rèn)為該先問問他嗎 ?六、 had better 在反意疑問句中。在反意疑問

6、句中，疑問部分一般用 had+ 主語？ ，但 有時(shí)可用 will you? 表示一種請求或建議。如：Youd better not go out today, had you?今天你最好不要外出，好嗎？I must stay at home this afternoon. You had better come tomy house, will you? 今天下午我必須 留在家里，你最好來我家，好嗎？七、在祈使句中， had 有時(shí)可以省略。如：Better not do it .最好別做那事。Better not wait for them. 最好不要等他們。八、 had better的被動(dòng)式

7、。You had better do it.-It had better be done.You had better have done it.-It had betterhave been done.九、 had better在間接引語中的用法。在直接引語變?yōu)殚g接引語的過程中， had better 同第 一人稱或第三人稱連用時(shí)，保持不變； had better 同第二 人稱連用時(shí)，可以保持不變，也可用 advise+ 賓語 +不定式 (賓補(bǔ) )來表示。如：He said, Ann had better hurry.-He said (that) Ann hadbetter hurry.H

8、e said, I had better hurry.-He said (that)he had better hurry.He said to me, You had better hurry. -Hesaid (that) I had better hurry.-He advised me to hurry.十、 had better在表示對別人勸告、建議時(shí)，不宜用于與陌生人、長輩及上級的交談中。對長輩說話時(shí)，最好不用 had better 。比較有禮貌的 說法是：It might be better for you.；It would be better for you.。如：It might be better for you to help me ， Grandpa. 爺爺，您最好能幫我一下。練習(xí)下列各句都有一處錯(cuò)誤，請改正。1.Youd better to wait for me a