20xx英語語法16種時態(tài)總結(jié)-閱讀頁
2024-11-20 03:55本頁面
【正文】 at as Newton was, many of his ideas have been challenged today and are being modified by the work of scientists of our time. 雖然牛頓是個偉大的人物，但他的許多見解直到今天還在受到挑戰(zhàn)，并且被現(xiàn)代科學(xué)家的工作所修正。
例：We have been working on this project for over a month now.
到目前為止，我們一直在處理那個項目，已經(jīng)花了一個多月時間了。就是我們常說的”過去的過去”。
?、诒硎緩倪^去的過去開始，持續(xù)到過去的動作或情況，并且有可能會繼續(xù)延續(xù)下去。
By the time I left the school, he had taught the class for 3 years.
到我畢業(yè)時,他已經(jīng)教那個班三年了.
：had been doing
表示從過去的過去開始，持續(xù)到過去的動作或情況，期間一直有規(guī)律的在進(jìn)行、不曾間斷，并且有可能會繼續(xù)延續(xù)下去。
例：The old clock had been being taken apart of and fixed up again for several times by my 10year old son before I came back home.
我回到家之前，我10歲大的兒子已經(jīng)把這個舊鐘表拆卸并重新組裝了好幾回了。
例：They said that by the end of the following month, the project would have been being worked for 3 years.
他們說到第二個月底為止，這項工程就已經(jīng)不停地進(jìn)行了3年了。
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