为什么是Since I know what a hard life she lived而不是Since I know what hard a hard life she lived

为什么是Since I know what a hard life she lived而不是Since I know what hard a hard life she lived I don't know -----it next .A wha t to do B how to do C how can I do D what can I do答案为什么是B I 've know him since he came here.(对划线部分提问since he came here为划线部分） I ___(know) him since he ___(is)a child since为什么是现在完成时的标志? I don't know her,but I know her name.为什么用her不用his为什么是性别不同 I did know why I felt like crying.为什么是主语从句? You’ve got to put the past behind you before you can move on. /I'm not a smart man ,but I know wha是什么意思啊 It was years since i had seen her.此处为什么是had seen ,可否用saw代替.句型不是It+is/was+时段+since+过去时? I have started the English classes since three weeks ago. 这句话为什么是错的?错在哪? Four years()since I ()the army 求分析为什么是 has passed joined而不是 passed have joined i didn't know they would go to Japan 为什么是they would I want to know _____ he will come tomorrow为什么是 if 而不是 when You know what i mean?为什么是你知道我的意思吗 I do not know which one to choose.为什么是用不定式呢? I don't know the cause of his abrupt leave为什么是his而不是 him 为什么是Do you want to know what I do?而不是what am do? I haven't gone to school since I___ ill.I'll go to school immediately when I recover.答案为什么是 have been 而不能填 had been