Since last August这句话能解释为从去年8月开始到现在吗?

Since last August这句话能解释为从去年8月开始到现在吗? since一定要用完成时么 i love you since last summer 这句话是对是错? Since last August ,the old lady____(have)had headaches threes to four times a month it's a long time since i last saw you这句话有错误么 I haven't heard from him since last week .请问这句话对吗? It's a long time since it raimed last time帮忙翻译下这句话, Great changes have taken place in China since the last thirty years这句话哪里有错? It’s been quite some time since I was last in London上面这句话中的last是什么意思? since和before的区别!It is thirty years since we last met.这句话用before怎么说?since和before的区别到底是什么?这种It is句型什么是用since?什么时候用before? (it is ） four years since we last saw each other.这句话括号里为什么不是there were 不是应该用过去完成时吗?since last August ,the old lady _____(have) bad headaches three to four times a month是用过去完成时还是用现在完成时？、 It really is a long time since I was last a student. 这句话里面的last是什么成分,这是正常语序么? in the last six months since he died这句话怎么翻译,死后的六个月?last在这里怎么翻? he left home last year and I have never seen him since这句话语法对不句子改错：错句he left home last year and I did not see him since.改正后成he left home last year and I have never seen him since.请高手指教, How have you been?It had been quite some time since we last met.这句话的译文大哥大姐帮我译, Its been a while since the last time that weve seen each other,这句话语法对吗 开头是Its还是It’s 26. The last elephant of that kind __________ since the early of last century. A. died B. has died C. was dead D. has been dead 选什么?这句话什么一死 Yes ,August is the eight month.这句话的问语是什么?