For anything,only the perseverance can bring success.問你一個(gè)語法方面的問題：when I read a book, I feel happy可不可以省略主語寫成when reading a book ,I feel happy時(shí)間狀語從句，還是寫完整比較好。但是會(huì)有有個(gè)字母" I "出現(xiàn)，會(huì)不會(huì)不地道呢？there is no unadulterated language, only the words local people say so every day. So, making what you want to express clear would be the priority.