1．The next day was clear and mild，and they were pleased to see the beautiful mountains looking out over the city.
2．However，they did not anticipate seeing such an open country，and were truly amazed.
3．Seen from the train window，the mountains and forests of Canada looked massive.
4．Finally，the company — headed by its new manager — started to make a profit.
[我的发现]
(1)句1中的pleased和句2中的amazed为过去分词作表语。
(2)句3中的Seen from the train window和句4中的headed by its new manager为过去分词短语作状语，过去分词与其逻辑主语之间是被动关系，往往含有完成的意思。
