be的过去式是was还是were还是been

were是过去式,还是was是过去式 当一般过去时是三单时be过去式是用was还是were 虚拟语气中i后面的过去式是were,那he或she后面的be动词是was还是were it is time that 句型中跟过去式,当动词是be动词时,过去式用was还是were? as if 后的BE动词是接were还是只是过去式 be+过去分词怎么确定be是is还是are还是were还是was? Jack and his father was in beijing yesterday.过去式是用was还是were? be+过去式 和 was/were+过去式的区别 英文*是*怎么说的啊!到底是was.were,been 还是am,are,is啊? did,was,were后接的动词用过去式还是用原型? 过去式 they were sang 还是they was sang 和 ...he were slept 还是 he had been 是 was 的过去式吗