过去分词（past participle）和现在分词一样，也是动词的一种形式。主要是由动词加-ed, -d, -t, -en, or -n后缀构成，如learned, baked, broken, torn等。
ü The museum is closed now.
ü The museum was closed by the administrator.
ü So there's a locked cupboard and you'll be informed of the code you need to open that.
ü The cuts are procured from Quebec with locally foraged ingredients rounding out each meal.
ü The helium is mostly trapped in subterranean natural gas bunkers and commercially extracted through a method known as fractional distillation.
“known as fractional distillation”作后置定语，相当于which is known as fractional distillation.
ü It is even more so when language learners choose to study the language with materials originated from that culture.
“originated from that culture.”作后置定语，相当于which are originated from that culture.
Finland's public finances are healthy, too, certainly compared with those elsewhere in the euro area.
Opened in 2002, it is central to the ambitious £84.5m Millennium Link project to restore navigability across Scotland by reconnecting the historic waterways of the Forth & Clyde and Union Canals.
ü Confronted with such a pressing unemployment problem,many experts bring up constructive solutions.
ü Situated in the heart of urban centres, they would drastically reduce the amount of transportation required to bring food to consumers.
Built in around 850 AD next to the temple of Harshat Mata, the baori comprises hundreds of zigzagging steps that run along three of its sides, steeply descending 11 storeys, resulting in a striking pattern when seen from afar.
The girl was hit by a shuttle bus when crossing the road, wounded severely in the head.
The board of director discussed the plan that they would like to see carried out the next year.
1）在感官动词之后，如see, hear, watch, feel.
2）在使役动词之后，如have, get, catch, leave.