329. Being ignorant of the law is not accepted as an excuse for breaking the law.

英语四级译文:
对法律的无知不能作为违法的借口。

四级词汇讲解:
本句的主语比较特殊，是由动词—ing形式所引导的短语。动词—ing形式作主语，往往表示一般的、抽象的、重复多次的行为。如:

1)Seeing is believing.眼见为实。
2)Playing with fire is dangerous.玩火很危险。

英语四级考点归纳:
动词—ing形式的句法功能除了作主语外，还能作宾语、表语、定语、状语以及宾语补足语。

※作宾语分为两种情况:
1)在suggest, enjoy, admit, appreciate，avoid, delay, dislike，escape，forgive，imagine, keep, miss, practise, resist, risd, deny, consider等动词之后;或在feel like，look forward to, be proud of, be responsible for, insist on，think off, dream of, object to, hear of, prevent…from，keep…from, stop…from, be engaged in,depend on，thank...for, excuse…for,aim at, devote...to，set about, be/get used to,be fond of, be afraid of, be tired of, succeed in，be interested in, be ashamed of等短语之后，只能用动词—ing形式作宾语。如:
I suggest doing it in a different way.我建议用另一种方法做这件事。
What can prevent us ( from ) getting married?有什么能阻止我们结婚?

2)在forget, go on, can't help, mean, regret, remember, stop, try等词之后可接动名词或不定式作宾语，但意义上有所区别。如:
I remember opening the window.我记得开了窗户。
I must remember to open the window.我必须记着要开窗户。

※作状语，表示与其逻辑主语即主句主语之间有主动关系:
1)原因状语。如:
Having no interest in the topic, he didn't go to the lecture.由于对这个话题没有兴趣，他没去参加讲座。
2)方式状语。如:
Traveling by train, we visited a number of cities.我们坐火车参观了多个城市。
3)时间状语。如:
Coming into the room, she saw everybody already at their work.进屋以后，她看到大家已经开始工作。
4)结果状语。如:
My car was caught in a traffic jam, thus causing the delay.我的车遭遇了交通堵塞，所以延误了。