英文問題睇唔明

解詞句
There are few grander public squares in Europe than Madrid’s Plaza Mayor, watched over on three sides by uniformly ochre-hued apartments with wrought-iron balconies

我想問watched over點解要加ed 同埋成句個意思係咩 特別係個by字.
呢度watched係被動式,Plaza Major俾D apartments三面watched(望)住。

burnings at the stake and deaths by garrotte took place on the north side of the square, hangings to the south.
睇唔明hangings to the south 究竟呢句點解?
burnings at the stake(燒死), deaths by garrotte(絞刑)都係死刑方式,喺北面(north)執行,hangings(吊刑)就喺南面(south)做。

Some plazas are the city’s great crossroads, transient, restless places where all of the city, and much of the world comes to play.呢句都係睇唔明
有D廣揚(plazas)係呢個城市嘅交滙處(crossroads),歇脚(transient)同繁忙(restless)嘅地方,全城同世界好多地方(嘅人)都來玩。

Solutions to the Difficult Eng,question:-
(1)There are few grandeur public squares in Europe than Madrid's Plaza Mayor,Watched over on 3 sides , by uniformly orchard-hued apartments with wrought-iron balconies.
----watched=when you've watched=present perfect tense,ellipsed,meaning:- In europe,very few public squares are as (grandeur) as that of "Plaza Mayor in Madrids". When you are watching about and around the 3 sides of uniformly orchard-coloured apartments with wrought-iron balconies,it will be an awe-inspiring,impressive sight.

(2)hangings to the south=corpses bodies executed were exhibited in the south.
-----Ancient time have got prisoners of burning and wrenching to be executed at north of square,while the corpses bodies were exhibited by hanging to the South.

(3)All cities and events extending to much world-activities=some plazas are the city's great crossroads venues with transient position and restless standings,where all of the city were even extending to much world-activities and prestige which will be showing off to that level.

watched是when you have watched 的省略寫法.全句的意思是:
在歐洲,很少公眾廣場能有西班牙"市長廣場那樣壯觀了,當你在此瞭望三方,可看到整齊的赭色公寓大樓,都有着以鍛鐵造成的露臺.

第二句的意思是:
在古代,火刑和絞刑的犯人,都在廣場的北面行刑,然後將他們屍體掛在南面陳列.

第三句的意思是:
有些廣場,是城市的交匯之點.流通活動不息之處,整個城市,甚而世界上的許多活動,都在那裏表現.