Since her birthday is in late summer, eight months behind mine, I basically became her driver when I turned 16 in December.
请问老师:
1 eight months behind mine是名词短语作定语修饰late summer吗?behind mine是介词短语作定语修饰eight months吗?
2 behind mine中behind是表示“落后于”的意思吗?
3 Since her birthday is in late summer和when I turned 16 in December这两个从句对应同一个主句I basically became her driver吗?