1 部分答案
1. for two years/since two years ago.
2. since I was ten years old.
3. since I came to this school.
4. since 2010.
5. for one year.
(答案仅供参考)
2 部分答案
<1>have <2>has <3>have <4>have been
<5>for <6>been <7>have <8>since
<9>Have <10>was <11>have <12>since