She like reading and so I do.为什么用so I do

She like reading and so I do.
so常用来代替上文提过的形容词、名词、动词等,意思是：那样的；此处代替reading.
It was such bad weather that we all had to syay inside.
such用来修饰名词,而so用来修饰形容词、副词或动词,这里的bad weather整体是个名词,不被bad一叶遮目而不见森林；如果要用so,必须改为so bad the weather.
I have never seen such big pears
理由同上,big pears整体是名词.
I seen to have met you before
这个句子不通,应改为I seem to have met you before.
yet意思是“从过去到现在,强调现在、目前”,但before指的是“过去某个时间,即从现在到过去,强调过去”.
There two young men stood there watching the train moving away为什么there前面不用加from或by那些词
句子错了,应该改为：
1.These two young men stood there...其中These two young men 是主语,stood 是谓语动词；
2.There were two young men standing there ...(句型：there be ...doing sth.)
they have moved away from Beijing they have moved away from Beijing before long
before long意思是“不久以后”；long before 是“很久以后”.
When you do eye-exercise,you must keep your eyes closed
keep your eyes closed直译为让你的眼睛被闭上,就说eyes是被you必起来的；如果用keep your eyes close,就成了眼睛要闭上某个事物了,close后还得补足一个宾语.
There is a lonely island为什么用lonely而不用alone
lonely是定语形容词,修饰名词是正当防卫,而alone虽然也可以用作形容词,但只是个表语形容词,即只能够用作表语,不能用作定语.