born 如果是的话,那么'When were you born?"中为什么有两个动词呢?请注意;“born”如果是助动词的话,为什么“bear”不是过去分词呢?

born 如果是的话,那么'When were you born?中为什么有两个动词呢?请注意;“born”如果是助动词的话,为什么“bear”不是过去分词呢? when did you born 和 when were you born 哪个用法是正确的如果是where 开头的呢 be born=at birth,那么when she was born可改为什么? 50w开关电源如果接10w负载那么实际耗电功率是10w吗? he was born on Sunday提问He was born on _sunday_划线提问 _what _day _ was he born on ?那么,如果说是,he was born in January.或者是 he was born in 1983.这两个应该怎么提问呢?（born后面的介词是否应该相应变化?疑问 水平方向有用功的计算书上说的是W有用=fs 为什么克服f做的功就是有用功?如果说两种情况 一种是匀直的时候 F拉=f W总=FS W有用=fs W总跟W有用相等吗?如果拉力大于f的话 那么F拉克服f做功 W有 W hen is your birthday?和When were you born?两个句型的区别越多越好!快, the war broke out in the year _he and his brother were born inA when B which为什么不用WHEN呢如果后面是were born 答案还是which 如果w是一个n次单位根.证明：如果w不等于1,那么1+w+w平方+…+w的n-1次方=0 When were you born? when was she born when they are born 电瓶车电机如果是1000w的,那么控制器一定要1000w的吗. When is his birthday?的his可以改成he嘛?为什么?我要考试,要今天内知道答案.是不是第三单用宾格呢?如果是的话,那么when is her birthday? 由公式,可以知道.U（电动机两端电压）I（通过它的电流）=W（机械）+Q（I^2*R)那么W=UI-Q=I(U-IR)=W不是吗..那么可以推出U-IR>0,即.IR1>IR ,也就是R1>R.如果这对的话,请问R是指什么,R1又是指什么呢,我 Ton was born in 1985.这句中的was born是系表结构吗?如果是的话,那是不是表达过去式的时候,系动词和表语都要是过去式? 电功计算公式W=UIT 如果W的单位是kw·h 那么t的单位是什么?如果W的单位是kw·h 那么t的单位是什么?如果w的单位是J那? when did he bear与when was he born为什么不能说成when was he born,有什么区别,为什么was是过去式,还能加过去分词