我们吃粽子，同时欣赏音乐(while enjoying)
激动的孩子们正在拆开他们的礼物(excite)
你听到有人在敲门吗？（knock at ）
这是20世纪80年代初所建学校中的一所（build）
我有许多工作要做，包括打印书信和接待客人(include)
the book lying on the desk in mine
when driving home , i saw a traffic accident
once published , this dictionary will be very popular
when he awoke , he found himself being looked after by an old lady
the foreign visitors were amazed at our achievement made in such a short time .
帮忙回答2个问题：
问题一：
现在分词与动名词的形式相同都是VING 形式 但是如何区别现在分词和动名词、
问题二：
现在分词完成被动句或have been done 表示被动完成 过去分词done 表示被动完成，两者都表示被动完成两者的区别
是精确的，请放心：
1.we are eating rice dumplings while enjoying music.
2.those excited children are opening their gifts.
3.do you hear someone knocking at the door
3.this is one of schools which were built at the beginning of the eighties
of the 20th century. eighties of the 20th century/1980's; 都可以
4.i have lots of work to do, including typing letters and meeting customers
1.the book lying on the desk in mine in 应该是is，你自己写错了 意思是桌子上
的那书是我的
2.回家路上，我看见了一宗交通事故.
3.一旦这本词典出版时，它将会很受欢迎。
4.当他醒来时，发现自己正在一位老妇人的照顾中。
5.外国访者对我们在这么短的时间里取得的成就感到很惊奇.
1.这个没有什么好说的。动名词相当于名词的性质，把它看做名词就可以
2.很简单，have been done 表示被动，对现在又影响。过去分词done，表示过去被动
，为一般过去情况，不一定对现在又影响
1.we are eating rice dumplings while enjoying music.
2.those excited children are opening their gifts.
3.do you hear someone knocking at the door
3.this is one of schools which were built at the beginning of the eighties
of the 20th century.
3. this is one of the schools which were built at the beginning of the eighties