国产精品麻豆欧美日韩ww_欧美日高清视频_亚洲精品成人久久久_久久精品国产清自在天天线

現(xiàn)在完成進(jìn)行時(shí)的用法

一、現(xiàn)在完成進(jìn)行時(shí)的構(gòu)成方法

現(xiàn)在完成進(jìn)行時(shí)由“have / has + been +現(xiàn)在分詞”構(gòu)成。

二、現(xiàn)在完成進(jìn)行時(shí)用法說明

表示現(xiàn)在以前這一段時(shí)間里一直在進(jìn)行的動作，這動作可能仍在進(jìn)行，也可能已停止：

He’s been watching television all day. 他看了一天電視了。

He has been doing this work for three years. 這工作他已干了三年了。

It has been raining since last Sunday. 自上周星期日以來就一直在下雨。

The war has been going on for nearly a decade. 戰(zhàn)爭已進(jìn)行近十年了。

Without (a) doubt you have been working very hard. 毫無疑問你工作一向努力。

I have been looking forward to meeting you. 我一直盼望會見你。

The pagoda has been standing there since the Tang dynasty. 這座塔從唐代以來一直矗立在這里。

Biological system has been doing this for billions of years. 生物系統(tǒng)這樣做已經(jīng)有多少億年了。

The Truman government has been spending some $ 200 billion yearly for war preparations. 杜魯門政府一直每年花2000億美元用于戰(zhàn)備。

現(xiàn)在完成進(jìn)行時(shí)有時(shí)表示根據(jù)直接或間接的證據(jù)得出的結(jié)論：

She is very tired. She’s been typing letters all day. 她很累了，她整天都在打信件。

Her eyes are red. She has been crying. 她眼睛紅了。她一直在哭。