only when they were told of the importance of time ____ wast
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only when they were told of the importance of time ____ wasting time is equal to wasting part of their life.
A.did those boys realize
B.had those boys realized
why not
A.did those boys realize
B.had those boys realized
why not
过去完成时,比过去更过去.when引导的从句是过去时,空后面主句的时态在从句发生后才发生.若选b,时间关系上就不对.
再问: 如果这里把had改为have可以吗?
再答: 很不合适,only when 倒装句型主句从句时态一致。
再问: 如果这里把had改为have可以吗?
再答: 很不合适,only when 倒装句型主句从句时态一致。
only when they were told of the importance of time ____ wast
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