用法:of necessity可以用作插入语,相当于necessarily。
例句1:Combing theory with practice is of necessity.
理论和实践相结合是很有必要的。
结构分析:Combing theorywith practice是主语(combine…with…),is是系动词, of necessity是表语。
例句2:It is not necessarily true that economic growth will make our world cleaner。(2016年6月六级)
经济增长并不一定会使我们的世界更清洁。
结构分析:It是形式主语,is not necessarilytrue是系表型谓语(is not是系动词+ necessarily true形容词词组作表语),that引导的句子是真正主语, economic growth是主语,will make是谓语,our world是宾语,cleaner是宾语补语。
短语:on and on (constantly) 不停地
用法:on and on通常用于动词之后,作方式状语,相当于continuously, constantly等。
例句1:They kept laughing on and on after hearing the joke.
例句2:New positions are constantly created that require people to keep learning. (2013年12月四级)
Over a million workers on 60,000 ships, moving hither and yon through the world’s oceans, transport 80 percent of the world’s trade.【WORKERS WORLD】
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