第1个回答 2014-12-15
I stated learning English since I was thirteen.本回答被网友采纳
第2个回答 2014-12-15
1 I began learning English at the age of 13.
2 I have been learning English since the age of 13.
第3个回答 2014-12-15
I have learned English since thirteen.
第4个回答 2014-12-15
I started learning English when I was thirteen.