错的.应该改为:when I was 10 years old,或 I have kept this book since I was 10 years old.去完成时中肯定句不可以使用瞬间动词,但是否定句可以使用瞬间动词.
请想学英语或想学好英语的朋友们,赶快加入小博士英语群110820509.本群服务宗旨:为群成员解答疑难问题.
错的.应该改为:when I was 10 years old,或 I have kept this book since I was 10 years old.去完成时中肯定句不可以使用瞬间动词,但是否定句可以使用瞬间动词.
请想学英语或想学好英语的朋友们,赶快加入小博士英语群110820509.本群服务宗旨:为群成员解答疑难问题.