第1个回答 2007-07-19
构成公式:主语+be+过去分词
一般现在时:主语+is/am/are+过去分词
English is taught in most schools in china.
一般过去时:
The computer was put into operation in 1942.
一般将来时:主语+shall/will+be+过去分词
This problem will be sovled at a meeting tomorrow.
现在完成时:主语+have(has)+been+过去分词
Many builings have been completed in the city.
其他的几个时态你变通一下就可以了
第2个回答 2007-07-19
一般过去(现在)时 : I was / am laughed!即在动词前面加一个be动词
一般将来是好像没有,就算有也 同上
总之,被动语态就是在动词前面加上一个be动词,再结合一下时态选择正确的表达形式就可以了。
第3个回答 2007-07-19
(1)一般现在时 It is locked at the moment.
(2)一般过去时 It was locked at that time.
(3)一般将来时 It'll be locked in 2 minutes.
(4)现在进行时 It is being locked now.
(5)过去进行时 It was being lock at that time.
(6)现在完成时 It has been locked since then.
(7)过去完成时 It had been locked before I went back home.
(8)过去将来时 He said it would be locked.