Some people claim that/ As is pointed out that/ It is generally believed that/ It is widely accepted that, there are some advantages of owning a private car.
There is no doubt that private cars benefit people hugely.
支持段的分论点：
① 方便 First, private cars provide people with the most convenient form of transportation.
② 舒适 Second, it is comfortable for people to travel in, especially in changeable weather/ raining days/ sand storm.
③ 炫耀 Third, only a private car can show a person`s social status/ achievement/ success/ prosperity in his or her career.
否定段的主题句：① However (Nonetheless/ Nevertheless/ But), there are some disadvantages of owing a private car/ Every coin has two sides.
② While enjoying the convenience that private cars bring us, we should not ignore the problem they create/ produce/ introduce/ make.
③ Despite/ In spite of/ For all the advantages, they brings their own disadvantages/ problems/ negative effects
④ Like anything else, private cars also have their own weakness/ limits.
⑤ However, private cars are not without shortcomings/ faults.
⑥ Yet other speak of the problems private cars have brought. They complain that......
⑦ However, private cars may also bring with it problems our society had not previously faced.
⑧ Despite the increase in efficiency and convenience generated by private cars, the changes they bring could very well lead to potentially adverse consequences.
否定段的分论点：
① 占有空间 On the one hand, private cars take up/ occupy too much space.
② 交通事故 On the other hand, a driver should be careful/ cautious while driving, otherwise, car accidents are more likely to happen.