They begin to dislike tourists and treat them impolitely.
他们开始不喜欢游客，对他们不礼貌。
We should not speak to the elderly impolitely.
我们不应该没有礼貌地对老年人说话。
Furthermore , he speaks too impolitely. He should speak more politely.
还有，他说话没礼貌，他应该礼貌地说话。
But the problem comes, some tourists act very impolitely, they get used to make some marks on the tourist sites, so as to prove that they have visited here.
但是问题来了，一些游客的行为很不礼貌，他们习惯在一些旅游景点上做些标记，以证明他们曾经来过这里。
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