She has swum since half an hour ago.不是说ago不能用在完成时吗?

She has swum since half an hour ago.不是说ago不能用在完成时吗? He_quite well ,but he has not had time to swim since this summer .A .will swim B.have swum C.swamD.will change she has lost touch since then 翻译 ( )she ( ) (study) english since she was ten,yes,she has she is __________(live)here ever since she has tea She has fallen ill since two days ago.(改错) Her English has improved g____ since she worked hard. She has been writing poems since her childhool.(改为复合句) She has been writing poems since___ She has lived in HK since she was born.(since she was born)划线提问怎么问? Since (retiring) from the company,she has done.为什么要用ing?和since有关吗? 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 She has moved to her new house since last week.请She has moved to her new house since last week.请问moved前面为什么加has She has not her from her husband since she left home. she ___English since she was a child.B had learned D has been learning she has remembered 1400 english words since she came to our school Lucy has made quite a few friends since she cane here.She`very happy. She has been playing basketball (since she was seven )（对括号内提问） She has been dead for about a month since she was killed in the accident.翻译