其基本构成是:have/has+done;过去完成时是指:在过去某个特定时间点或动作之前就发生的行为,即过去的过去。其基本构成是:had+done。 那为什么我们要在写作中适当加入完成时呢?因为多种时...
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...
A) isn't B) wasn't C) weren't D) hadn't been 33.The population of many Alaskan cities has ___ doubled in the past three years. A)larger than B)as great as C)more than D)as many as 34.All that can be done ___. A)have been done B)have done C)has 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 doesn’t seem ___ much education. A. to receive B. to be receiving C. to have received D. to have been received 2、The magnificent museum is said___ about a ...
been和done的区别 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...
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