例：——Mary has been ill for a week.

　　——Oh，I didn't know. I will go and see her.

　　（2）am/is/are going to do

　　①表示計劃、打算做某事。

　　例：This is just what I am going to say.

　　這正是我想說的。

　　②表示根據某種跡象看，很可能或即將發生的事情，表推測。

　　例：Look at the dark clouds in the sky. It's going to rain.

　　看天上的烏云，要下雨了。

　　（3）am/is/are about to do

　　表示“即將、正要”時，可用。強調近期內或馬上要做的事。

　　例：Don't worry， I am about to make a close examination on you.

　　別擔心，我馬上就給你做一次仔細的檢查。

　　（4）be to do

　　①表示“按計劃、安排即將發生某事或打算做某事”。

　　例：She is to be seen in the lab on Monday.

　　星期一你準會在實驗室見到她。

　　②該做或不該做的事情（語氣上接近于should， must， ought to， have to），表示一種命令、規勸性語氣。

　　例：You are to go to bed and keep quiet， kids. Our guests are arriving in less than 5 minutes.

　　孩子們，你們必須 上床睡覺，不準吵鬧。我們的客人5分鐘之內就要到了。

　　10. 將來進行時(will be doing)

　　強調在將來的某個具體時間正在發生的動作或事情。

　　例：Don't worry， you won't miss her. She will be wearing a red T-shirt and a white skirt at that time.

　　別擔心，你不會認不出她的。她到時會穿一件紅色的T恤衫和一條白色的短裙。

　　11. 將來完成時(will have done)

　　表示從將來的某一時間開始、延續到另一個將來時間的動作或狀態，或是在某個將來時間完成，但對其后的另一個將來時間有影響的動作或狀態。就好象把現在完成時平移到時間軸的將來時時段一樣。

　　例：The conference will have lasted a full week by the time it ends.

　　會議從開始到結束將持續整整一個星期。

　　12.將來完成進行時：(will have been doing)

　　例：By the end of next month， the project will have been being worked for 3 years.

　　到下個月底為止，這項工程就已經不停地進行了3年了。

　　13.過去完成進行時：had been doing

　　例：The old clock had been being taken apart of and fixed up again for several times by my 10-year old son before I came back home.

　　我回到家之前，我10歲大的兒子已經把這個舊鐘表拆卸并重新組裝了好幾回了。

　　14.過去將來進行時：( would be doing )

　　例：The government promised that a new highway would be being built next July.

　　政府承諾說第二年7月將有一條新的高速公路正在修建。

　　15.過去將來完成時：(would have done)

　　例：I believed by the end of that year an advanced version of that software would have been developed， but I was wrong.

　　我堅信到那年年底為止，那個軟件的新版本將被開發出來。但是我錯了。

　　16.過去將來完成進行時：(would have been doing)

　　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，這項工程就已經不停地進行了3年了。

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