My young brother couldn't work out the answer and ( ) 为什么填“nor could I".翻译一下再加为什么.

MY young brother my young brother is afraid when my mum leaves同义句改为my young brother is( )when my mum( ). Young brother Brother Green My brother is too---------(young)to go to school my,young,is,a,brother,doctor,Tom(.)(连词成句) My brother ___(read) many books when I was young. 我的哥哥是不是my old brother,我的弟弟是不是my young brother that young man is my old brother对(my old brother画线部分提问) 先行词是the young man还是manThe young man who standing there is my brother. my little brother is too young to look after himself.同义句 my little brother is ______ young that he ____________look after himself. 同义句转 Although my brother is very young,he works hard.My brother is very young,_ he works hard. i am ten.my brother is thirteen.my sister is fifteen.用比较级合并为一句my sister is young,but my brother is___and i am__ __. My brother is so young t() he can't go to school=my brother isn't old enough to go to school.=my brother is too young to go to school My little brother is very young .He can't go to school.改同义句 My little brother is very young.He can`t go to school.改为同义句 My brother is so young that he can't go to school.(改为同义句） My young brother is old enough to go to school.enough在这里充当什么词性? I am young.My brother is younger.(将两句合为一句）