(10) 和 (11) 里的up可用可不用,意思都一样只是加上了up感到稳健些。
下面这些动词+up里的up也是可有可无,没有影响语义:
close up, divide up, hurry up, polish up, check up, follow up, finish up, seal up等。
五、协助组成片语动词,如:
(12) Something surprising has turned up.
(13) The train picked up speed after a while.
(14) Where did you pick up that habit?
(15) Please speed up if you dont want to lag behind.
常见的含up的片语动词(phrasal verbs)还有:
bring up(抚养长大), brush up(复习), crop up(突然出现), ring up(打电话), give up(放弃), look up(查阅), let up(中止)等。
六、协助组成一些具特殊意义的惯用语,如:
(16) Time is up.(时间到了)
(17) This matter is up to you; I wouldnt mind(由你决定).
(18) What are you up to?(搞什么鬼?)
(19) I am up to my ears in work.(忙得不可开交)
(20) Your mother has been looking for you up and down.(四处寻找)
(21) Many older people have experienced the ups and downs of life.(盛衰变化)
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