demanded that he (should) be
【问】 People are demanding that she 
the company.
人们要求她离开公司。
我已明白上句中的leave为美国英语用法，should leave为英国英语用法。但我不知道如果将are demanding改为demanded，则句中的leave或should leave将如何变化。
【答】 应当记住：这种用法的现在时虚拟式或should+动词原形没有时态的变化。当主句的谓语动词为现在时、过去时或将来时，它们都不发生变化：
1. He asked that it be done right now. (TOEFL)
他要求立即做这件事。
2. I suggest that he apply for the job. (LEG)
我建议他申请这份工作。
3. I insisted that he should change his clothes. (CGEL)
我坚持要他换衣服。
(参见request)
赵振才 编著.英语常见问题解答大词典.哈尔滨：黑龙江人民出版社.1998.第1047页.
- habitual present(习惯现在时)
- had better
- had better/better
- had better not/hadn’t better
- had expected
- had he been
- had hoped to do/hoped to have done
- had it not been for
- had meant to do/meant to have done
- had not the entrance been spotted
- had rather
- had thought
- hair/hairs
- half a year/a half year
- half of... is/are
- ham and eggs
- hand/hands
- hang
- happen to(do)/happen to sb.
- happily
- hard/hardly
- hardly
- hardly...before
- hardly... before
- hardly...but