OG12 11，为什么用完成时

zhuang8825

There are several ways to build solid wallsusing just mud or clay, but the most extensively used method has been theforming of bricks out of mud or clay, and, after some preliminary air drying orsun drying, they are laid in the wall in mud mortar.
A.    theforming of bricks out of mud or clay, and, after some preliminary air drying orsun drying, they are laid
B.     formingthe mud or clay into bricks, and, after some preliminary air drying or sundrying, to lay them
C.    havingbricks formed from mud or clay, and, after some preliminary air drying or sundrying, they were laid
D.    toform the mud or clay into bricks, and, after some preliminary air drying or sundrying, to lay them     (D)
E.     thatbricks were formed from mud or clay, which, after some preliminary air dryingor sun drying, were laid
题目我会做，是典型的平行，但是他的完成时用得让我觉得很别扭。是表示这种方法延续到现在吗？

xiqiong

OG 上说 used with have been or has been, this verb tense decribes sth. that begin in the past, continues into the present, and may continue into the future.

DUKB24

动作在过去完成

现在的视角去看过去的动作


所以是过去完成时


现在完成时除了continued action也可以表示的continued effect（或者更简明的说relevant to the current topic）

abjure

OG 上说 used with have been or has been, this verb tense decribes sth. that begin in the past, continues into the present, and may continue into the future.

-- by 会员 xiqiong (2012/12/2 9:34:07)

对啊， 你不觉得这样的现在完成时表述在这个句子非常精准有效吗。

TerraceHo

根據MGMAT所說，present perfect的使用有兩種情況：
（1）動作開始於過去，結束於過去。但是動作產生的影響對現在仍然存在。
（2）動作開始於過去，現在依然持續。

^^