1. Unless you want to end a relationship, you don't tell another person what you think of her or him like this.
unless在本句中的意思是“if not” (除非,如果不),如:
1)You will fail the exam unless you study harder. (你若不更加努力学习,考试会不及格。)
2)We will go on with the experiment unless something unforeseen happens. (如果不发生意外,我们将继续试验。)
3)I will not go to the party unless he invites me. (如果他不邀请我,我就不去参加聚会。)
4)Nothing, unless a miracle, can save him. (除非出现奇迹,他无法得救。)
end在本句中用作动词,意思是“结束”。如:
1)The meeting did not end until midnight. (会议开到半夜才结束。)
2)The anti-Japanese War ended in 1945. (抗日战争于1945年结束。)
3)He refused to end his four-week tour in such a manner. (他不愿以这种方式结束为期四周的旅行。)
2. Failing to be impressed by a friend's collection of stamps, yawning when a golfer tells you about what great shot he made… are all things that educated people try not to do.
本句中三个并列的动名词短语做主语,整个句子是一个“主语+系动词+表语”的句型。如:
1)Smoking is not good for your health. (吸烟有害你的健康。)
2)Making experiment is one way of learning. (实验是学习的一条途径。)
be impressed by 意思是“给…深刻印象”。如:
1)I was impressed by his talent. (他的才干给我留下了深刻的印象。)
2)He was impressed by the gorgeous sunset. (绚丽的夕阳给他留下了深刻的印象。)