prove是没有被动的，所以不能用 it has been proven 应该是 it has proven.
不过，用过去分词proven的表达会更多一些：has been proven，表示“被证明、被证实”的状态:Preventative medicine has been proven to be the most effective way of reducing the incidence of fatal childhood diseases.
谁说prove不能用被动？ 但我建议你强调动词用法用前者， 而proven多用作形容词
has proved 或 proven 或 proven 解析:考查动词时态。句中时间状语 So far 与现在完成时连用,与主语 no one 一致用单数,故填 has proved/proven。universal 解析:考查形容词。修饰句中名词 idea 用形容词,指“普遍的想法”,故填 universal。broadly 解析:考查副词。修饰 speaking 用副词,指“一般地说,广义地说...
It has been proven that 指某件事被证明是客观真实的。例句：It's been proven that the answer is wrong.事实证明，答案是错误的。此处的It 是形式主语，指代that后面的东西。Her action proves that 指她的行为证明了某件事的真假。此时prove作主动，应该不难理解。
Cold-Hearted YouthLaughter is a great thing.It has been proven to be physically and mentally effective on people(71) .The reason for this is that people are laughing at the wrong things,particularly the youth.They find humor in things that people wouldn't have generally found funny in the ...
It has been proven many times that farmers farm their own land more carefully and productively than they cultivate someone else’s soil. Again, a prime example comes from Japan, where, at the close of World War II, huge stretches of{{U}} (67) {{/U}}were in the hands of absentee la...
Laughter is a great thing.It has been proven to be physically and mentally effective on people(71) ___ .The reason for this is that people are laughing at the wrong things,particularly the youth.They find humor in things that people wouldn't have generally found funny in the past.More ...
theForbiddenCityhasprovedwrongmanypeople?sideasaboutantiquerestorers,allowingthem 9 (realize)thattheyarenotold,dullprofessors,butpeoplein 10 (they)40s,30sand even20swhocanbequitepleasingtotheeye. Thedocumentaryhasevenmadesomeyoungpeopleaskthequestion,“Isittoolatetochange myjob?” 1. 2. 3. 4. 5. ...
A decade later, experiments were conducted to see if Einstein or Bohr were correct and based on the results Bohr was. Einstein’s version of reality cannot be true. It has been proven. The two entangled photons properties couldn’t have been set from the beginning, but only come into ...