for yet ago before since分别用于什么时态

for yet ago before since分别用于什么时态 谈since,for,ever,already,yet,just,before的用法? 用before,ever,never,already,yet,since,for填空 I seem to have met you().A：before B：ago C：yet 选哪个?为什么? Have you___been to the USA?No ,______用 before ago already yet ever never just justnow they worked three days_____before ago long for哪一个?before和ago有什么区别,简洁些, I seem to have met you ____.A.yet B .before C.ago D.some time请问选哪一项? ---Xiao Wang, have you seen this film_____? ---- No, not yet.A, ago B, before C, yesterday D, last week Amy has a cold _____.A.for two days ago B.for two days before C.two days ago D.two days before for ...year(s) ago用什么提问除此之外还有for ...year(s) ...year(s)agosince ...year(s）ago when ___ your father leave for sansha city?three days ___ A will;ago Bdid;ago Cwill;laterDdid;before 英语同义句转换[15内速度]1 The girl left her home a year ago.She has not come back yet.The girl has _____ _____ from her home for a year2 My father has never been to other countries before.My father has never _____ _____before.3 My mother we 用never,ever,already,yet,for,since填空1.I have _______ seen him before,so I have no idea about him.2.Jack has _________ finished his homework ________ an hour ago.3.Mr.Wang has taught in this school ________ ten years.4.“Have you ________ seen t 用never,ever,already,yet,for,since填空.1.I have _______ seen him before,so I have no idea about him.2.Jack has _________ finished his homework ________ an hour ago.3.Mr.Wang has taught in this school ________ ten years.4.“Have you ________ seen Tom has lived in Shanghai____three years ago.A for B.since C.before D./ It all happened a long time ____.A,before B,ago C,for D,since several weeks ago 换现在完成时,是several weeks before还是for several weeks we went to hollywood_____ a.for two years b.two years ago c.before tow years