请问大家It seemed inconceivable that the pilot could have survived thecrash.中的could have survi...请问大家It seemed inconceivable that the pilot could have survived thecrash.中的could have survived怎么理解和解释?

it seemed that the headmaster will come to our class.请问大家这里seemed用过去时,而后面为什么又用将来时呢? 请问大家It seemed inconceivable that the pilot could have survived thecrash.中的could have survi...请问大家It seemed inconceivable that the pilot could have survived thecrash.中的could have survived怎么理解和解释? 关于It seemed as if 请问 It seemed as if 后可用一般现在时吗?比如 刚刚外面好像下雨了It seemed as if it is raining It seemed obviously还是It seemed obvious It seemed as if... it seemed certain that It seemed unlikely to me,but our class teacher seemed absolutely ___ about it.A.sure B.positive C.certain D.doubtless答案是B,请问为什么 it seemed certain that she would be the first ship home.请问home做什么词? 用it seemed that造句 Oh it seemed forever stopped 请问大家“Let it flow It seemed only several minutes___ (before/after) he finished this painting.请问选什么?请详细说明为什么这么选. It seemed that后接什么从句 it seemed that从句中用什么时态 It seemed to ring forever是什么意思? here we found little snow,most of it seemed(to have been)blown off the mountain请问这里为什么不能用that it had been? 请问这句英语中的从句后为什么还要有一个before?It seemed as though this was the first time it had ever seen human beings before. It seemed that he was very cute He seemed ____ ____very cute