had been laid 強(qiáng)調(diào)已經(jīng)放置,發(fā)生在過(guò)去的過(guò)去.
was being laid 強(qiáng)調(diào)放置的動(dòng)作當(dāng)時(shí)正在進(jìn)行.
had been laid和was being laid的區(qū)別……
had been laid和was being laid的區(qū)別……
英語(yǔ)人氣：405 ℃時(shí)間：2020-04-12 04:47:43
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