already(已經(jīng)），just（剛剛），never（從不），ever(曾經(jīng)），yet（仍然）for+一段時(shí)間，since+過(guò)去年代/+過(guò)去時(shí)間/+一般過(guò)去時(shí)態(tài)的句子。例句：I have known him for years.我認(rèn)識(shí)他已經(jīng)好幾年了。

現(xiàn)在完成進(jìn)行時(shí)是英語(yǔ)中動(dòng)詞的一種基本時(shí)態(tài)，其構(gòu)成為：主語(yǔ)+助動(dòng)詞（have/has）+been+動(dòng)詞的現(xiàn)在分詞+其他成分。表示動(dòng)作從某一時(shí)間開(kāi)始，一直持續(xù)到現(xiàn)在，或者剛剛終止，或者可能仍然要繼續(xù)下去。

基本句型：

肯定句：主語(yǔ)+have/has+been+動(dòng)詞的現(xiàn)在分詞+其他

否定句：主語(yǔ)+haven’t/hasn‘t+been+動(dòng)詞的現(xiàn)在分詞+其他

一般疑問(wèn)句：have/has+主語(yǔ)+been+動(dòng)詞的現(xiàn)在分詞+其他

肯定回答：Yes.主語(yǔ)+have/has

否定回答：No.主語(yǔ)+haven't/hasn't

All these years they have been contributing articles to our magazine.

這些年來(lái),他們一直為我們雜志寫(xiě)稿.

She has been writing the letter since four o”clock in the afternoon.

從下午四點(diǎn)鐘到現(xiàn)在,她一直在寫(xiě)信.

We have been studying in this school for three years.

我們一直在這所學(xué)校學(xué)習(xí)了三年.

How long have you been watching TV?

你看了多久電視了?

We have been seeing quite a lot of each other recently.

最近我們常常見(jiàn)面.