float

1. 不是我不喜欢这辆车，而是它太贵了。
it's not that i don't like this 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 is not that i don't want to help you,but i am too busy with my work for recently
3. 不是他不需要你帮忙，而是他怕给你带来麻烦。
it is not that he don't need your help,but he is afraid to bring trouble to you