The pedestrian link has been changed because a column was located in the road median 1. The beam was constructed with a length/diameter/etc of 600mm 2. The beam has been constructed with a length/diameter/etc of 600mm is changed -- Use this for always: Any design is changed whenever an error is discovered was changed -- Use this to state the simple past fact: The design was changed yesterday has been changed -- Use this when you wish to stress the recentness of the past fact, or or to stress that the task is complete.
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AnonymousI think that you should to use 'was changed' on the past tense and 'has been changed' on the progressive present .Please note that "has been changed" is the present perfect (passive), not a progressive tense. Progressive tenses have an "ing" form. It is being changed.
AnonymousThe pedestrian link design was changed ...
The beam was constructed with ... Here you are calling attention to events in the past. These things happened. The speaker will think back in time and imagine these things happening.AnonymousThe pedestrian l