1、一些有兩個部分構成的名詞表示衣物或工具作主語時,?謂語通常用復數(shù)形式：glasses,?clothes,?trousers,?shoes,?compasses,?chopsticks,?scissors等。2、如果主語用a?kind?of?,?a?pair?of?,?a?series?of等加名詞構成時,?謂語動詞一般用單數(shù)形式。例如：A?pair?of?shoes?was?on?the?desk．3、并列主語如果指的是同一個人、同一事物或同一概念時,?謂語動詞用單數(shù)形式,?這時and后面的名詞沒有冠詞。例如:?Truth?and?honesty?is?the?best?policy．4、當主語后面跟有as?well?as,?as?much?as?,?no?less?than,?along?with,?with,?like,?rather?than,?together?with,?but,?except,?besides,?including,?in?addition?to等引導的詞組時,?其謂語動詞的單、復數(shù)按主語的單、復數(shù)而定。例如:?The?teacher?as?well?as?the?students?was?excited．5、A?(great)?number?of修飾可數(shù)復數(shù)名詞,?謂語動詞用復數(shù);?a?great?deal?of,?a?large?amount?of?修飾不可數(shù)名詞,?其短語作主語時,?謂語動詞用單數(shù)。6、關系代詞who,?that,?which等在定語從句中作主語時,?其謂語動詞的數(shù)應與句中先行詞的數(shù)一致。例如:Those?who?want?to?go?please?sign?your?names?here．7、季節(jié)、月份、星期、節(jié)日、假日、一日三餐、學科名稱，球類、棋類名詞名稱前一般不加冠詞。?1/2?one(a)?half?1/4?one(a)?quarter1、限定詞+數(shù)量形容詞(序數(shù)詞在前，基數(shù)詞在后)+性狀形容詞+大小、長短、高低等形體+新舊+顏色+國藉+材料。
2、某些以a-開首的形容詞例如：afraid，alike，alone，asleep，awake,?alive?等只能作表語,不能作定語。3、某些以-ly結尾的詞是形容詞而不是副詞：friendly，lively，?lovely，lonely，likely，deadly，silly，orderly,?timely等。1)close接近地 closely仔細地，密切地2)free?免費地 freely自由地,無拘束地9)loud大聲地 loudly大聲地(含有喧鬧的意思)
1、表示一方不及另一方時，用“l(fā)ess＋原級＋than”的結構表示：This?room?is?less?beautiful?than?that?one．
2、表示一方超過另一方的程度或數(shù)量時，可在比較級前加表示程度的狀語，如：even，a?lot，a?bit，a?little，still，much，far,?yet,?by?far等修飾，例如：He?works?even?harder?than?before．3、by?far?通常用于強調最高級。用于比較級時,一般放在比較級的后面,?如放在前面,應在二者中間加“the”。例如：He?is?taller?by?far?than?his?brother.4、某些以-or結尾的形容詞進行比較時，用to代替than。superior，junior，senior等。例如：He?is?superior?to?Mr.?Wang?in?mathematics．5、在比較從句中為了避免重復通常用that(Those)，one(ones)代替前面出現(xiàn)的名詞。that指物，one既可指人，也可指物。that可代替可數(shù)名詞單數(shù)和不可數(shù)名詞，而one只能代替可數(shù)名詞。例如：The?book?on?the?table?is?more?interesting?than?that?on?the?desk．A?is?three?(four,?etc.)?times?the?size?(height,?length,?width,?etc)?of?B.?例如：The?new?building?is?four?times?the?size?(the?height)?of?the?old?one.?這座新樓是那座舊樓的四倍大(四倍高)。［高三倍］A?is?three?(four,?etc.)?times?as?big?(high,?long,?wide,?etc.)?as?B.例如：Asia?is?four?times?as?large?as?Europe.亞洲是歐洲的四倍大。A?is?three?(four,?etc.)?times?bigger?(higher,?longer,?wider)?than?B.?例如:Your?school?is?three?times?bigger?than?ours.?你們的學校比我們的學校大三倍。7、表示“最高程度”的形容詞，如excellent，extreme，perfect等，沒有最高級，也不能用比較級。1、如果復數(shù)名詞前有many、few，不可數(shù)名詞前有much、little等表示量的形容詞時，該用so而不用such。如：
I've?had?so?many?falls?that?I'm?black?and?blue?all?over.2、當little不表示數(shù)量而表示“小”的意思時,仍用such。如:They?are?such?little?children?that?the?they?cannot?clean?the?house?by?themselves.1、在very,?pretty,?not后用nearly,?不用almost。例如：?I'm?not?nearly?ready.2、在any,?no,?none,?never前用almost,?不用nearly。例如：?I?almost?never?see?her.1、need?表示“需要”或“必須”,作情態(tài)動詞時,僅用于否定句或疑問句中。在肯定句中一般用must,?have?to,?ought?to或should?代替。例如：Need?I?finish?the?work?today??－－Yes,?you?must.注意：needn't?have?done“表示本來不必做某事而實際上做了某事”。例如：You?needn't?have?waited?for?me.2、“should?have?done”表示應該做到而實際上沒有做到。例如：You?should?have?started?earlier.你應該早點開始。3、“ought?to?have?done”表示過去應做某事而實際未做。例如：You?ought?to?have?helped?him?(but?you?didn't)?。那時你應該幫他的（但是你沒有）。4、書報的標題,小說等情節(jié)介紹常用一般現(xiàn)在時。5、表示感覺,愿望和狀態(tài)的某些動詞如have,?be,?hear,?see,?like等詞一般不用進行時。有些動詞形式上是主動結構,但表示被動的意思。常見的有可和?well,?easily?等副詞連用的不及物動詞sell,?wash,?write,?read,?clean,?cook等。例如：The?cloth?washes?well.這布很經(jīng)洗。1、在動詞?arrange,?command,?demand,?desire,?insist,?order,?propose,?request,?require,?suggest等后面的賓語從句中用“(should)＋?動詞原形”(虛擬語氣)例如：We?suggested?that?we?(should)?have?a?meeting.
2、作advice,?idea,?order,?demand,?plan,?proposal,?suggestion,?request等名詞的表語從句和同位語從句,其謂語動詞要用虛擬語氣的結構“(should)＋動詞原形”。例如：We?all?agreed?to?his?suggestion?that?we(should)?go?to?Beijing?for?sightseeing.1、在feel,?hear,?notice,?observe,?see,?watch,?have,?let,?make等詞后的補足語中,不定式不帶to。但是這些句子如果變成被動結構時,就必須帶to。例如：He?is?often?heard?to?sing?the?song.2、不定式動詞在介詞but,?except,?besides后面時,如果這些介詞之前有行為動詞do的各種形式,那么,這些介詞后的不定式不帶to,否則要帶to.例如：-What?do?you?like?to?do?besides?swim?-I?have?no?choice?but?to?go.作定語的不定式如果是不及物動詞,或者不定式所修飾的名詞或代詞是不定式動作的地點、工具等,不定式后面須有相應的介詞。1、There?/?It?is?no?use/?good/?not?any?use/?good/?useless?doing?sth.例如：He?is?looking?for?a?room?to?live?in.admit,?appreciate,?avoid,?consider,?delay,?enjoy,?escape,?excuse,?feel?like,?finish,?forgive,?give?up,?imagine,?include,?keep,?mention,?mind,?miss,?practice,?put?off,?resist,?risk,?suggest,?can't?help,?can't?stand(無法忍受)等。例如：I?tried?not?to?go?there.?(我設法不去那里。)I?tried?doing?it?again.?(我試著又干了一次。)3、mean?to?do?有意...?mean?doing意味著...I?mean?to?come?early?today.?(我打算今天早些來。)Missing?the?train?means?waiting?for?another?hour.?(誤了這趟火車意味著再等一個小時。)
動詞need,?require,?want作“需要”解,其后跟動詞作它的賓語時,若表示的含義是被動的,必須用動名詞,或不定式的被動式。
例如：?The?window?needs(requires,?wants)cleaning(to?be?cleaned).
在短語devote?to,?look?forward?to,?pay?attention?to,?stick?to,?be?used?to,?object?to,?thank?you?for,?excuse?me?for?等后的動詞也必須用動名詞形式，例如：I?look?forward?to?hearing?from?you?soon.Badly?polluted,?the?water?cannot?be?drunk.?(原因)Being?written?in?haste,?the?composition?is?full?of?mistakes.?(原因,強調寫的過程,故應用現(xiàn)在分詞一般被動式)Having?been?deserted?by?his?guide,?he?couldn't?find?his?way?through?the?jungle.(為了強調已完成的動作)Asked?to?stay,?I?couldn't?very?well?refuse.這里?asked?可能意味著?having?been?asked,?也可能意味著when/since?I?was?asked,?但用了?having?been?asked?就不會有歧義。下面句中過去分詞表示的時間與謂語動詞所表示的時間相同，所以不能代之以強調先于謂語動詞的現(xiàn)在分詞完成被動式。例如：?Covered?with?confusion,?I?left?the?room.我很窘地離開了房間。?United,?we?stand;?divided,?we?fall.?團結則存，分裂則亡。?He?used?to?live?in?London,?use(d)n't?he?/didn't?he?There?used?to?be?a?cinema?here?before?the?war,?use(d)n't?there?/didn't?there?Such?things?ought?not?to?be?allowed,?ought?they??He?ought?to?be?punished,?oughtn't?he?但在正式文體中,用ought?we?not形式。例如:We?ought?to?go,?ought?we?not?或We?ought?to?go?,should?we?not?含有情態(tài)動詞must的句子表示推則,作“想必”解時,疑問部分不可用mustn't
1、若前句強調對現(xiàn)在情況的推測,疑問部分用aren't(isn't)十主語,例如：You?must?be?tired,aren't?you?2、若陳述部分的must表示“有必要”時,附加疑問句部分則用needn't。例如：You?must?go?home?right?now,?needn't?you?3、當mustn't?表示禁止時,附加疑問部分一般用must。如：?You?mustn't?walk?on?grass,?must?you?4、前句謂語動詞是must?have＋過去分詞時,若前句強調對過去情況的推測(一般有過去時間狀語),疑問部分的謂語動詞用didn't＋主語;若前句強調動作的完成,疑問部分的謂語動詞用haven't(hasn't)＋主語,?例如：?He?must?have?met?her?yesterday,?didn't?he?5、陳述句謂語部分出現(xiàn)否定詞綴時(前綴或后綴),疑問部分仍用否定結構。例如:He?is?unfit?for?his?office,?isn't?he?6、如果陳述部分包含有no,?never,?hardly,?seldom,?few,?little,?nowhere,?nothing等否定或半否定詞時,疑問部分用肯定形式。例如：He?is?hardly?14?years?old,?is?he?7、如果陳述部分的主語為everyone,?someone,?no?one等不定代詞,其疑問部分的主語可用he,也可用they。?例如：Everyone?knows?his?job,?doesn't?he?Let's?go?there,?shall?we??Let?us?go?there,?will?you?同位語從句跟在名詞后面,進一步說明該名詞的具體內容
引導同位語從句的名詞主要有fact,?news,?promise,?idea,?truth等。連接詞用that?(不用which)及連接副詞how,?when,?where,?why等。例如：His?delay?is?due?to?the?fact?that?the?car?went?wrong?halfway.She?asked?the?reason?why?there?was?a?delay.關聯(lián)詞只能用whether不能用if表示“是否”的情況如下:The?question?is?whether?the?film?is?worth?seeing.The?news?whether?our?team?has?won?the?match?is?unknown.2、在主語從句中,只有用it作形式主語時,whether和if都能引導主語從句,否則,也只能用whether。例如：Whether?we?shall?attend?the?meeting?hasn't?been?decided?yet.?It?hasn't?been?decided?whether(if)we?shall?attend?the?meeting.It?all?depends?(on)?whether?they?will?support?us.He?doesn't?know?whether?to?stay?or?not.We?didn't?know?whether?or?not?she?was?ready.6、引導讓步狀語從句,只能用whether。例如：Whether?you?like?it?or?not,?you?must?do?it?well.7、用if會引起歧義時。例如：Please?let?me?know?if?you?like?it.?該句有兩個意思：“請告訴我你是否喜歡”。或“如果你喜歡,請告訴我?！庇昧藈hether就可以避免。十五、在下面幾種情況下必須用“that”引導定語從句
1、先行詞是不定代詞：all,?few,?little,?much,?something,?nothing,?anything等。例如：All?that?we?have?to?do?is?to?practice?every?day.2、先行詞被序數(shù)詞或形容詞最高級所修飾。例如：The?first?lesson?that?I?learned?will?never?be?forgotten.3、先行詞被all,?any,?every,?each,?few,?little,?no,?some,?等修飾。例如：I?have?read?all?the?book?(that)?you?gave?me.4、先行詞被?the?only,?the?very,?the?same,?the?last?修飾時。?例如：He?is?the?only?person?that?I?want?to?talk?to.5、先行詞既有人又有物時。例如：They?talked?of?things?and?persons?that?they?remembered?in?the?school.先行詞是表示地點時,要根據(jù)從句的謂語動詞是及物的還是不及物的。
1、如果是及物的就用that(which),否則用where。例如：This?is?the?house?where?he?lived?last?year.2、用no?sooner…than和hardly…when引導的從句表示“剛……就……”。1、主句中的動詞一般用過去完成時,從句用過去時;而且主句一般倒裝,把助動詞had提到前面。例如：Hardly?had?I?entered?the?room?when?I?heard?a?loud?noise.2、代詞作主語時,主謂語序不變。例如：Here?it?is.?Here?he?comes.3、當句首狀語為表示地點的介詞詞組時也常常引起全部倒裝。例如：South?of?the?city?lies?a?big?steel?factory.?From?the?valley?came?a?frightening?sound.4、表語置于句首時,倒裝結構為“表語+連系動詞+主語”。例如：Present?at?the?meeting?were?Professor?White,?Professor?Smith?and?many?other?guests.A)用于省略if的虛擬條件狀語從句。例如：Had?you?reviewed?your?lessons,?you?might?have?passed?the?examination.B)用于“形容詞(或名詞、動詞)+as(though)引導的讓步狀語從句中。例如：Pretty?as?she?is?,she?is?not?clever. Try?as?he?would,?he?might?fail?again.C)如果從句的表語是名詞,其名詞前不加任何冠詞。例如：Child?as?he?was,?he?had?to?make?a?living.D)用于no?sooner…than…,hardly…when和not?until的句型中。例如：Not?until?the?teacher?came?did?he?finish?his?homework.E)用于never,?hardly,?seldom,?scarcely,?barely,?little,?often,?at?no?time,?not?only,?not?once等詞開頭的句子。?例如：Never?shall?I?do?this?again.Little?did?he?know?who?the?woman?was.F)用于以only開頭的句子(only修飾副詞,介詞短語或狀語從句時)。例如：Only?this?afternoon?did?I?finish?the?novel.G)如果only后面的詞組不是狀語,則不用倒裝。?例如：Only?Wang?Ling?knows?this.H)用于某些表示祝愿的句子。例如：May?you?succeed!?祝你成功!an?American－two?Americans，have?a?few?words?(a?word)?with?sb.與某人說幾句話某些集體名詞,?如people,?police,?cattle等,?只當復數(shù)看待,?謂語動詞必須用復數(shù)。例如：The?police?are?searching?for?him.
