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英语语法问题as soon as he heard the news,he burst into tears.请问这句话

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英语语法问题
as soon as he heard the news,he burst into tears.请问这句话是as soon as when he heard the news,he burst into tears的缩写吗?
英语语法问题as soon as he heard the news,he burst into tears.请问这句话
不是.as soon as和when都可引导时间状语从句,意思不一样.when是当...时,as soon as意思是“一...就”.致学
再问: 那为什么the moment he heard the news,he burst into tears.这个句子就省略了when呢?
再答: 这里不是省略了,引导时间状语从句的词很多。表示“一...就”的就有好几个,比如:副词directly/instantly,名词the moment, the instant, the minute,the second,还有as soon as, hardly ... when, no sooner ... than 等。the moment, when 不能同时出现,二选一,意义不同。致学