用SINCE或FOR填空 ( )3hours ( )two hours ago ( )we were young ( )he left here

用since或for填空 怎样区分时间点时间段 用SINCE或FOR填空 ( )3hours ( )two hours ago ( )we were young ( )he left here 用since for because 填空 用since for because 填空 用since和for填空 用since、for或ago填空.1.We haven't seen Sally ( ) six months. 用since、for或ago填空. 1.Harry left this town eighteen months ( ). 用since 和for 填空 英语 现在完成时用since或for填空用since或for填空He has lived in Nanjing ( ) the year before last.I have known him ( ) we were children.He has been in the village ( ) last week.要给出理由. 用since、for或ago填空.1.Harry left this town in January and we haven't seen him. 用never ever already yet for since填空 英语 用before,ever,never,already,yet,since,for填空 什么时候选since或for? 用for或since填空：（1）Mr Li has taught in the school______he graduated from the college.(2)The old woman has waited for you_____five hours.(3)The meeting has been on_____several minutes.(4)The couple have been married_____1999. 用for或since把句子改为现在完成时 用for或since完成句子,我没去过博物馆 用since或for填空.1、Mike has been sstudying english_he was six years old.2、i have been watching you_tow minters.3、i have been parcticing the piano_10:30. She has been ill ＿＿＿ more than tShe has been ill ＿＿＿ more than two weeks.（用for或since填空 用for 或者since