should 的同义词为:ought to, be supposed to,等
ought to一般用于阅读中,用法普遍
be supposed to 是比较正式的说法,书面语较多。
You ought to scrap the old bike and buy a new one.你应该扔掉这辆旧自行车,买一辆新的。
IthinkIoughttogetbacktowork.
我想我该回去工作了。
Perhapsweoughttohavetrustedpeoplemore
也许我们本当对人多一些信任的。
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