was playing是过去式还是将来,如果是过为何是加ing而不是加ed?

was playing是过去式还是将来,如果是过为何是加ing而不是加ed? were是过去式,还是was是过去式 the following Saturday是过去式还是将来式? 请问while引导的从句是跟过去式还是过去进行时比如while I was playing computer game,he ————是写he came ,还是写 he was coming. be的过去式是was还是were还是been急 this morning是用什么句式?this morning 使用将来式还是过去式? whatll happen 和whatll they do分别是什么式,是过去式还是将来式? was后面的动词是原形还是过去式? was后面+原形还是过去式? 过去式,I was playing .+ING就不是动词了 John said that he was leaving for london on wednesday.he后面为什么用过去式was我看这句明明是将来式嘛 John said that he was leaving for london on wednesday.he后面为什么用过去式was?我看这句明明是将来式嘛. Jack and his father was in beijing yesterday.过去式是用was还是were? 是playing a piano 还是playing piano 德语 请问was machen sie am wochenende?是询问过去还是将来? 强调句It is/was……that… 中be的时态是这样吗:原句是过去式(一般过去式...强调句It is/was……that… 中be的时态是这样吗:原句是过去式(一般过去式,过去将来式,过去完成式,无论哪种过去式)be都 was+动词ing还是加动词过去式? was后跟动词原形还是过去式