he has since written more than 45 books 这句话为什么要加个she has since written more than 45 books这句话为什么要加个since为什么要since

he has since written more than 45 books 这句话为什么要加个she has since written more than 45 books这句话为什么要加个since为什么要since He hasn't written since he has left.改错哪里有错啊?请指出,并改错. he has been in english since last He has written a book,the name____I have completely forgotten. he has written a Book _____name i have forgotten. 连成句子 now,he,up,written,three,to,has,books A book was written on the subject.He has written a book on this subject.时态? the writer has written the book( )(since/for)a few days. 1.The country life he was used to_____greatly since 1992.A change B has changed C changing D have changed2.The book was written in 1946,____the education system has witnessed great changes.A when B during which C since then D since when he has c___ a lot since he came here He has tauhgt here since he come here 对since he come here 提问 he has been here since he left college.对since he left college提问 （）（）has he been here He has been here since 1996 __ __ 9 years since he _ Jennie --- her mother daily since she had been East.A.wrote B.was writing C.has written D.had written 但我觉得应该是A 句型转换,He is the writer .He has written books.(合并为一句话 The book was written in 1946,the education system has witnessed great charges.The book was written in 1946, the education system has witnessed great charges.A．when B．during whichC．since then D．since when ( )The book was written in1946,_____ the education system has witnessed great challenges.( )The book was written in1946,_____ the education system has witnessed great challenges. A.when B,during which C.since which D.since when 答 Jim has made many friends since he ___to china.