liosha, The time has come in your English studies to learn about the present subjunctive. Demand is one of those verbs of command that cannot be followed by the more usual pattern of object + infinitive but has to be followed by a that-clause with should + infinitive or with past, present or present subjunctive form verbs. Insist, suggest, and recommend (among others) also follow this pattern, but other verbs that suggest that something is desirable or necessary or important follow the object + infinitive pattern. Compare the following: I asked him / told him to stop phoning me. I implored him / begged him to stop phoning me. I insisted / demanded that he should stop phoning me. I insisted / demanded that he stopped phoning me. I insisted / demanded that he stop phoning me. The leader demanded that her ordnance should be replenished before the next strike. The leader demanded that her ordnance was replenished before the next strike. The leader demanded that her ordnance be replenished before the next strike. The leader demanded her ordnance to be replenished before the next strike.....ungrammatical The leader demands that her ordnance be replenished before the next strike. The leader demands that her ordnance is replenished before the next strike. The leader demands that her ordnance should be replenished before the next strike. Everyone urged her to continue with her education for a further three years. Everyone advised her to continue with her education for a further three years. Everybody recommended that she should continue with her education for 3 more years. Everybody recommended that she continued with her education for 3 more years. Everybody recommended that she continue with her education for 3 more years. Even her granny recommends that she continues with her education for 3 more years. (present tense main verb) The above is adapted from BBC World Service Learning English website. http://www.bbc.co.uk/worldservice/learningenglish/grammar/learnit/learnitv201.shtml

It is the subjunctive mood. demand + subjunctive Do you know the subjunctive?

The leader demanded that her ordnance be replenished before the next strike. --------------------------- 这是美国英语遗留的产物，你只要明白可以这么用就可以了。有点类似汉语的省略。在这里缺少了should，真正的英国的英语应该是： The leader demanded that her ordnance should be replenished before the next strike.

The action she is demanding is "to be replenished". "Was replenished" means it already happened.