新概念英语第二册语法知识点：knock常用短语

第第页新概念英语第二册语法知识点：knock常用短语新概念英语第二册语法知识点：knock常用短语挨饿受冻

1、knockat

该短语表示“敲(门、窗等)”。有时，knock也会用作名词，表示“敲击”，后面也是紧跟介词at。如：

Hewonderedwhetheritwouldbepropertoknockatherdoor.(他不知道敲她的门是否恰当。)

IwaspreparingforbedwhenIheardaknockatthedoor.(我正准备睡觉时听到有人敲门。)

2、ff

该短语表示“把...撞倒”，off后面一般接地点。但knock后面也可以接比例或数字，表示“减少”，此时的比例或数字也可以放到off后面。如：

Iknockedthevaoffthetableandbrokeit.(我把花瓶从桌子上碰掉下来，摔碎了。)

韩式发型Theshopassistantknocked10%offthebill.(店员给了10%的优惠)

密欲Itcostme10butI'llknockoff20%asit'snolongernew.(那是我花10英镑买的，因为已经旧了，我会减价20%。)

3、knockoff

与ff不同的是，knockoff中间一般不插入其他成分，表示“做完某事;下班”。如：

Weknockoffat12:30forlunch.(我们十二点半时停下工作去吃饭。)

颜真卿楷书字帖Icanknockoffapoeminfiveminutes.(我能在五分钟内写一首诗。)

4、knockover

该短语表示“撞倒;消除”，需要注意的是：宾语是名词的话，可以放在knock和over中间，也可以放到over后面;宾语是代词的话，则只能放在中间。如：

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=Don'tknockitover.

Thestudentsknockedovereverydifficulty.(学生们克服了每一个困难。)

=Thestudentsknockeditover.

5、knockout

该短语表示“击倒;打昏”。需要注意的是：宾语是名词的话，可以放在knock和over中间，也可以放到over后面;宾语是代词的话，则只能放在中间。如：

Theenemychargedupthemountain,attemptingtoknockoutourforces.(敌人向山上冲锋，企图把我们的兵力摧毁掉。)

Inthefight,thethiefknockedthepolicemanout.(在搏斗中，小偷把警察打昏了。)

除了以上教材中出现的短语以外，下面这些有关knock的短语也较为常用：

6、knockdown

火荆该短语表示“击倒;撞倒;拆除”。如：

府西街Thepolicemenhadtoknockdownthedoortogetin.(警察为了进去得撞倒门。)

Knockdownthemachinebeforeshipping.(在装运前把机器拆卸开来。)

国庆节的诗7、knockup

该短语表示“匆忙做完;使...精疲力尽”。如：

Canyouknockupamealforusnow?(你能为我们赶快做顿饭吗?)

Iwascompletelyknockedupfromoverwork.(由于工作过度，我完全累垮了。)

8、knockitoff

七下单词该短语经常用作提示语，表示“别再讲下去”。如：

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Willyoukidsknockitoff?Ican'tstudy.(够了,小鬼们,停下来。我无法专心念书。)

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