since和for的题目,I have been studying at NESE_________ january.My head hurts!I have had a headache_______________four hours.Jake hasn't worked__________last summer.He has been unemployed___________seven months.I am so hungry!I haven't eat

since和for的题目,I have been studying at NESE_________ january.My head hurts!I have had a headache_______________four hours.Jake hasn't worked__________last summer.He has been unemployed___________seven months.I am so hungry!I haven't eat have done for/since和have been doing for/since区别i have lived in us for 2 months i have been living in us for 2 months i have lived in us since 2 months agoi have been living in us since 2 months ago小弟实在是没财富 只能说声谢谢 have done for/since和have been doing for/since区别i have lived in us for 2 months i have been living in us for 2 months i have lived in us since 2 months agoi have been living in us since 2 months ago小弟实在没财富 对不起啊, since then,I （ ）beijing A.have left B.left C.have leave D.leaving但for和since不是不能和短暂性动词连用么? since和for的区别? for和since的用法 since 和for 的区别 for和since的区别 i have been here ( )a year.A,since B,for Since he left after I have been looking for living. have been to 能和for或since引导的时间状语从句连用吗?I _________the north for a year.这里填have been to 为什么答案上给的是have been in have been to 能和for或since引导的时间状语从句连用吗?I _________the north for a year.这里填have been to 为什么答案上给的是have been in i have stopped smoking since 2001.的同意句i have ( )( )smoking since 2001. have been to这里的have 这里have been是延续性动词吗?have been to后能跟for和since引导的时间状语从句吗?I _________the north for a year.这里填have been to 为什么?have been to与have been in如何辨别 for和since一样,也要用延续性动词吗,for和since一样,主句是现在完成时,从句是一般过去时吗?为什么这一句,I have lived in xu zhou since I left nanjing,为什么不用For,要用since呢,用for可以吗 have since been 和 have been since I have been here since I was born 和I haden't seen him since he left NANJING.两句话为什么用的不是相同的时态? I could hardly see anything () the dense fog.(since for)They have worked in this company () they graduated.(since for)