现在完成时标志词用法202 应飞宇这是大家提出的问题：现在完成时标志词：since,for,before,yet,already,so far,ever,never,just讲解1、already意思是“已经”通常用于陈述句中（放在have和has的后面）也可用于疑问句，表示期望得到肯定的回答或表示惊异，此时already常放在句末。Has she found her bike already？她已经找到自行车了？2、yet用法yet可用于否定句，此时译为“还”；I havent found my ruler yet.也可以用于疑问句，译为“已经”（放在have和has的后面也可放在句末）Have you found your ruler yet？你已经找到尺子了吗？3、just只用于陈述句意思是“刚才”（放在have和has的后面）I have just received a letter.4、never用于否定句译为“从不”（放在have和has的后面）Ive never been to Beijing.5、ever用于疑问句译为“曾经”（放在have和has的后面） Have you ever been to Beijing?6.before用于肯定句译为“以前”（放在have和has的后面一般放在句末）。如He has never been to Beijing before .She has washed clothes before .练习选填already,yet,just,never,ever,before,since,so far,for1. Has she waited for an hour _?2. I have _ been to England.(否定)3. Li Ming has known him _ then.4. Wang Ming has read the book _.5. His father has been in the Party _ years.6. It has rained _ such a long time!7.I have _ done my homework.8.He has _ had a headache.yetneversincebeforeforforalreadyjust翻译句子：1.她以前从没吃过芒果。你吃过么。2.我刚刚参加完法语考试。3.他今年已经去了三次美国了。4.到目前。没有他的消息。Shes never had mango before,have you?Ive just taken the French exam.Hes been to America for 3 times this year.We havent got imformation about him so far.