(改)現(xiàn)在完成時-展示頁
2025-08-03 13:27本頁面
【正文】 6. So far, many countries _______________(develop) their software programs. Chen ______(give)up smoking last year. Chen __________(give) up smoking since last year. have read has gone did go went have developed gave has given 下一頁 上一頁 主菜單 現(xiàn)在完成時的主要用法 上一頁 下一頁 It’s so dark. Someone has turned off the light. (有人剛把燈關(guān)了 ,對現(xiàn)在造成的結(jié)果是 :現(xiàn)在很黑 ) Are you free? I have finished my homework. I am free (我已 經(jīng) 完成了家庭作 業(yè) ,對現(xiàn)在造成的結(jié)果是 :現(xiàn)在很有空 ) 主菜單 對現(xiàn)在造成的影響或結(jié)果。 現(xiàn)在完成時的主要用法 過去 已經(jīng)開始了 , 一直持續(xù)到現(xiàn)在 ，還有可能繼續(xù)持續(xù)下去。如：recently,already,just,lately,for…,since…,yet 等。 We haven’t seen Jim recently. 最近我們沒有見到吉姆。 ? He has already left here. 他已經(jīng)離開這里了。 ? Have you written to your parents yet? 你 已經(jīng) 給你父母寫過信了嗎？ 2） yet在現(xiàn)在完成時中的用法 否定句 :句末 “ 還 (沒有 )” 疑問句 : 句末 “ 己經(jīng) ” Eg. I haven’ t had breakfast yet. Have you had breakfast yet? 3） just表示 “ 剛剛 ” （用于完成時態(tài)時，與 already，never 等副詞的位置一樣，多用在助動詞 have/has和動詞過去分詞之間） ? He has just e back. 他剛剛回來。 未有過的 經(jīng)歷 . 上一頁 下一頁 I have ever been to the Summer Palace? (我曾去過頤和園 ) I have never had a car. (我從未有過汽車。 (從 10年前開始 ,持續(xù)到現(xiàn)在還在學(xué) ) She has swum since half an hour ago. 我已經(jīng)游泳了半個小時 (半個小時前已經(jīng)開始游泳 ,到現(xiàn)在還在游 ) 現(xiàn)在完成時的主要用法 主菜單 過去 已經(jīng)開始 , 一直持續(xù)到，還有可能繼續(xù)持續(xù)下去。 + Eg. I have been here for 5 weeks. He has studied English for 3 years. 一段時間 2. since + 從句 (一般過去時 ) 單詞 詞組 (表示過去某一時間的 )時間點 Eg. I have been here since 2022. I have been here since 5 years ago. I have been here since I graduated in 2022. since: (自 … 以來 ) 1)since+時間點 He has stayed here since 5 o’ clock. 2)since+ 時間段 + ago He has stayed here since 5 hours ago. 3)since+ 從句 She has taught English since he came here. for: (長達(dá) 多久 ） for+ 時間段 He has
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