祈使句~~祈使句和to 引导的句子有什么不同to+动词原形引导的句子叫做动词不定式动词不定式作主语引导的句子要有额外的谓语动词这句话and引导的是两个并列句后一句话有独立的主谓结构所以是祈使句，不需要主语，只是强调动作谢谢，我还有个问题5. We looked everywhere for the keys, but they are nowhere __C____. A. to find B. to have foundC. to be found D. being found答案是C，为什么不选B因为钥匙是被找到的，表示被动关系~~这句话首先要选不定式因为第二句已经有谓语动词arenowhere to be found是做系动词的标语，不定时做nowhere的补足语这两个句话你怎么翻译：there is no one to take care ofthere is no one to be taken care of there is nothing to dothere is nothing to be done1没人照顾2没人需要照顾3无事可做4没什么可做的7. To test eggs, ___A___ them in a bowl of water: if they float they’re bad, if they sink they’re good. A. putB. putting为什么？？也是祈使句呗，To test eggs作插入语~~强调动作~~~你怎么这么多问题~~汗，我都有点郁闷了~~喜欢就采纳吧~~要是有别的问题，就另外提问吧~~