been是be的过去分词;done是do的过去分词。常见的用法是have done和have been done,have done是主动形式的现在完成式,have been done是被动式的现在完成式。 1、done的含义及相关短语用法 形容词adj.已完成的;煮熟的;合乎礼仪的;合乎规矩的感叹词表示接受建议)动词·做...
例:The government promised that a new highway would be being built next July. 政府承诺说第二年7月将有一条新的高速公路正在修建。 15 过去将来完成时:(would have done) 例:I believed by the end of that year an advanced version of that software would hav...
例:The government promised that a new highway would be being built next July. 政府承诺说第二年7月将有一条新的高速公路正在修建。 15.过去将来完成时:(would have done) 例:I believed by the end of that year an advanced version of that software would hav...
成人高考学位英语备考练习:非谓语动词 一、不定式 (一)基本结构 to do to be doing to have done to be done to have been done 学位英语真题汇编 1、Judging from his manners at the party, he does
2、They have done things they ought ___ A. not to do B. not to be done C. not to have done D. not having done 3、I' m sorry I couldn't get in touch with him before he left, I ___ him earlier. A. had a telephone B. have phoned C. should have...
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