现在完成时 学生版 现在完成时标志词 already, yet, ever, never, just, before放句末 for+时间段 (注意：for decades) since +时间点/句子(一般过去时) (注意：since then) recently,lately最近，近期 so far,up to now,by now,until now截至目前，直到现在 In recent years在近些年 these years 这些年 in/during/over the past/last few years在过去几年里 Ever since the company _____ (launch) its new product line last year, sales _____ (increase) by 30% and the trend shows no signs of slowing down. The scientist, who _____ (devote) the past decade to researching renewable energy,make a breakthrough in solar panel efficiency. We _____ (not receive) any updates from the team leader since he _____ (leave) for the international conference last week. The small town, which _____ (transform) from a rural community into a tourist hotspot two years ago,_____ (attract) millions of visitors over the past five years. Although she _____ (study) French for two years, she _____ (win) several language competitions in the past two years. My parents _____ (live) in this neighborhood since they _____ (move) to the city in 2008. Recently,the old library, which _____ (serve) the community for decades, _____ (undergo) a major renovation to modernize its facilities. It's the first time that I _____ (try) making homemade pasta, and I think the process is both challenging and rewarding. The team _____ (complete) half of the experiment, but they _____ (not analyze) the data yet. Since the government _____ (introduce) new environmental policies, air quality in the city _____ (improve) significantly. My sister, who _____ (work) as a volunteer in Africa for three months,_____ (send) us dozens of photos capturing local life. The famous author _____ (publish) five best-selling novels so far, and his latest work _____ (translate) into over 20 languages. We _____ (not see) any signs of rain since the drought _____ (begin) six months ago. Ever since the smartphone _____ (revolutionize) communication, the way people interact _____ (change) dramatically. My neighbor _____ (repair) his car three times this month, but it still_____ ( not function) properly. The research team _____ (collect) data from over 1,000 participants, and they _____ (start) the analysis next week. By now, the movie _____ (break) several box office records and _____ (become) a cultural phenomenon. She _____ (lose) her keys twice this week, and she _____ (forget) where she puts them. The city _____ (expand) rapidly since the subway system _____(open) in 2015,___ (lead) to new housing developments. We _____ (finish) the first draft of the essay up to now, but now we _____ (need) to revise it for grammar errors. Since he _____ (join) the fitness club, he _____ (lose) 10 kilograms and improved his strength. The museum _____ (exhibit) works by famous artists for years, but it _____ (never, showcase) contemporary pieces before. My family _____ (visit) this beach every summer since I _____ (be) a child, creating countless memories. The compa ... ...
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