这句话的will为什么不用过去时?Dr Qian died in October,2009 and will be remembered by the world

这句话的will为什么不用过去时?Dr Qian died in October,2009 and will be remembered by the world 为什么不用过去时?I haven't summoned you here for apologies.我不是叫你来道歉的.这句话为什么用现在完成时,不用过去时. He will go back to his parents,because he left home for too long这句话中leave为什么用过去时?为什么不用一般现在时呢? 为什么不用过去时 这句话的条件句为什么不用过去时?If dinosaurs still exist on earth ,how could a man survival? She watched TV until her mother came back.这句话为什么前面不用过去进行时? She watched TV until her mother came back.这句话为什么前面不用过去进行时? DR.Watson and i will spend the night locked in your room.这句话为什么用locked? 英语翻译为什么不用过去时 I hope everything I have told you （will not have been forgot ）by next lesson.这句话能把括号里的词改成过去将来时或过去将来完成时吗?为什么?这句话怎么翻译? 关于现在分词,过去分词,动词不定式做定语现在分词,过去分词,动词不定式做定语时的区别,还有他们的被动形式为什么被动形式有时候没有用be?过去分词就直接表示被动那么不用be吗?还有be dr 英语时态：I wanted to know when they would go to see the great wall为什么这句话的从句用一般现在时,不用过去时? She and her family hid away for nearly five years before they were discovered为什么不用过去完成时这句话不是过去的过去吗? The lights went out just as we entered the cinema.这句话为什么不用过去进行时? 这句话中的talk为什么不用过去时?There he heard an astronaut,Bob,talk about his journey. This will get you started with your project.这句话中为什么用start的过去分词? 疑问句中动词的过去时为什么不用加ed did 后面的 give 为什么不用过去时?why?