过去式 they were sang 还是they was sang 和 ...he were slept 还是 he

过去式 they were sang 还是they was sang 和 ...he were slept 还是 he They sang in the park.They were happy.（合并为一句）They ____ _____ 一般过去式they were so happy对吗?还是they was so happy They sang in the park.They were happy.(合并为一句) They were singing while we were dancing.和He came while I was were是过去式,还是was是过去式 He slept in the daytime and slept at night.中slept是过去式还是过去分词? They sang songs by the campfire.They sang songs____the campf I insisted that he were innocent还是was innocent? He lived alone and they were sure he was c____.、怎么填啊? were能否缩写He was是否等于he'sthey were 是否等于 they're请给出严格证明 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