2021年下半年英語(yǔ)四級(jí)語(yǔ)法知識(shí)精選

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    1.2021年下半年英語(yǔ)四級(jí)語(yǔ)法知識(shí)精選
    1)a bit, a little, rather, much, far, by far, many, a lot, lots, a great deal, any, still, even等
    2)還可以用表示倍數(shù)的詞或度量名詞作修飾語(yǔ)。
    3)以上詞(除by far)外,必須置于比較級(jí)形容詞或副詞的前面。
    典型例題:
    1) ---- Are you feeling ____?
    ---- Yes,I'm fine now.
    A. any well B. any better C. quite good
    D. quite better
    答案:B. any 可修飾比較級(jí),quite修飾原級(jí),well的比較級(jí)為better.
    2)The experiment was____ easier than we had expected.
    A. more  B. much more   C. much
    D. more much
    答案:C. much可修飾比較級(jí),因此B,C都說得通,但easier本身已是比較級(jí),不需more,因此C為正確答案。
    3)If there were no examinations, we should have ___ at school.
    A. the happiest time  B. a more happier time
    C. much happiest time  D. a much happier time
    答案:D。
    2.2021年下半年英語(yǔ)四級(jí)語(yǔ)法知識(shí)精選
    大多數(shù)形容詞(性質(zhì)形容詞)和副詞有比較級(jí)和級(jí)的變化,即原級(jí)、比較級(jí)和級(jí),用來表示事物的等級(jí)差別。原級(jí)即形容詞的原形,比較級(jí)和級(jí)有規(guī)則變化和不規(guī)則變化兩種。
    1) 規(guī)則變化
    單音節(jié)詞和少數(shù)雙音節(jié)詞,加詞尾-er,-est來構(gòu)成比較級(jí)和級(jí)。
    構(gòu)成法     原級(jí)     比較級(jí)   級(jí)
    一般單音節(jié)詞  tall(高的)   taller  tallest
    未尾加-er,-est great(巨大的) greater  greatest
    以不發(fā)音的e結(jié)尾 nice(好的)   nicer  nicest
    的單音詞和少數(shù)  large(大的)  larger  largest
    以- le結(jié)尾的雙 able(有能力的) abler  ablest
    音節(jié)詞只加-r,-st
    以一個(gè)輔音字母 big(大的)    bigger  biggest
    結(jié)尾的閉音節(jié)單 hot熱的)    hotter  hottest
    音節(jié)詞,雙寫結(jié)
    尾的輔音字母,
    再加-er,-est
    "以輔音字母+y" easy(容易的)  easier  easiest
    結(jié)尾的雙音節(jié)詞,busy(忙的)   busier  busiest
    改y為i,再加
    -er,-est
    少數(shù)以-er,-ow clever(聰明的) cleverer cleverest
    結(jié)尾的雙音節(jié)詞 narrow(窄的)  narrower narrowest
    未尾加-er,-est
    其他雙音節(jié)詞和 important(重要的)
    多音節(jié)詞,在前      more important
    面加more,most            most important
    來構(gòu)成比較級(jí)和 easily(容易地)
    級(jí)?!        ore easily
    most easily
    2) 不規(guī)則變化
    原級(jí)      比較級(jí)   級(jí)
    good(好的)/    better    best
    well(健康的)
    bad (壞的)/     worse     worst
    ill(有病的)
    old (老的)     older/elder oldest/eldest
    much/many(多的)   more      most
    little(少的)    less     least
    far (遠(yuǎn)的)   farther/further  farthest/furthest
    
    3.2021年下半年英語(yǔ)四級(jí)語(yǔ)法知識(shí)精選
    1)在否定句或疑問句中可用so… as。
    He cannot run so/as fast as you.
    2)當(dāng)as… as 中間有名詞時(shí)采用以下格式。
    as +形容詞+ a +單數(shù)名詞
    as + many/much +名詞
    This is as good an example as the other is.
    I can carry as much paper as you can..
    3)用表示倍數(shù)的詞或其他程度副詞做修飾語(yǔ)時(shí),放在as的前面。
    This room is twice as big as that one.
    Your room is the same size as mine.
    4) 倍數(shù)+ as + adj. + as <=> 倍數(shù)+ then + of
    This bridge is three times as long as that one.
    This bridge is three times the length of that one.
    Your room is twice as large as mine.
    Your room is twice the size of mine.