prove

1.prove的过去分词在英国现在只用proved，但在美国往往用proven。

2.下面三句意思相同：

• That proved him progressive.
• That proved him to be progressive.
• That proved that he was progressive.

3.下面每组里的两句意思相同：

• He has proved a fine teacher.
  He has proved to be a fine teacher.
• The report proved false.
  The report proved to be false.

注意每句里的proved都是不及物动词，作“被见到（是）…”解。

He has proved himself (to be) a fine teacher和He has proved (to be) a fine artist略有不同。加上了himself含有“他已经渐渐被人见到是…”的意思，不加上himself含有“他到后来已经被人见到是…”的意思。