有关于英语语法6

请写明过程

答案为D。
本题考查了一个固定搭配no sooner ... than,意思是“一……就……”。用这个搭配的注意点是:1、在no sooner这个部分用的时态为过去完成时(had done),在than后面用的时态是一般过去时(did);2、如果把No sooner放在句首,则这部分需要部分倒装。
看本题,than后面用的是set的过去式(set的过去式和过去分词都是set),因此答案为D。
如果No sooner放在句首,这个句子可以说成No sooner had he got to the lab than he set out to do the experiment.
和这个固定搭配相同意思的还有hardly ... when,用法也和no sooner ... than一样(既时态的用法、倒装的用法都一样)。如上句可以说成:He had hardly got to ... when he set out to do ...
再如:Hardly had he got the good news when he jumped with joy.
需要注意的是,如果用as soon as 这个短语也可以表达相同意思,但是时态用法上两边都是用一般过去时。
如:As soon as he go to the lab, he set out to do the experiment.
He jumped with joy as soon as he got the good news.
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