xuqiulin

1. 不是我不喜欢这辆车，而是它太贵了。
it's not that  I don't like the car, but it's too expensive
2. 不是我不愿意帮你，而是因为这段时间我工作太忙了。
it's not that I won't like to help you, but I have been so busy for recently
3. 不是他不需要你帮忙，而是他怕给你带来麻烦。
it's not that he didn't need you help, but he was affraid to bother you