但不想要这个英文怎么说

如果你不想要这个东西，可以说：

"I don't want it."

这句话来源于英语中助动词 "do" 的否定形式 "don't" 和动词 "want" 的基本形式。

例句：

"I don't want any more food. I'm full." (我不想吃了，我已经饱了。)
"I don't want to go to the party. I'm too tired." (我不想去参加聚会，我太累了。)

注意，如果你想表达不想要某物而不是不想要某人，应该使用 "I don't want it" 而不是 "I don't want him/her"。

例句：

"I don't want the present. It's not my style." (我不想要这件礼物，它不是我的风格。)
"I don't want the job. It doesn't pay enough." (我不想要这份工作，报酬太少。)